Paternal Family Tree: Gerulfing
Maternal Family Tree: Mathilde Bethune -1264
Around 1270 [his father] Floris Gerulfing V Count Holland [aged 15] and [his mother] Beatrix Dampierre [aged 10] were married. She by marriage Countess Holland. She the daughter of [his grandfather] Guy Dampierre Count Flanders [aged 44] and [his grandmother] Mathilde Bethune. He the son of William Gerulfing II Count Holland and Elizabeth Brunswick-Lüneburg Countess Holland. They were fourth cousins. He a great x 3 grandson of King Stephen I England. She a great x 5 granddaughter of King William "Conqueror" I of England.
In 1284 John Gerulfing I Count Holland was born to Floris Gerulfing V Count Holland [aged 29] and Beatrix Dampierre [aged 24]. He a great x 4 grandson of King Stephen I England.
In June 1285 John Vesci was sent with two others to negotiate the marriage between [his future father-in-law] Edward's [aged 45] daughter [his future wife] Elizabeth [aged 2] and John [aged 1], son of Floris V Count of Holland [aged 30].
On 5th April 1291 [his mother] Beatrix Dampierre [aged 31] died.
On 27th June 1296 [his father] Floris Gerulfing V Count Holland [aged 42] was killed. His son John [aged 12] succeeded I Count Holland.
Floris has transferred his allegiance to France inviting the enmity of [his future father-in-law] King Edward I of England [aged 57] who relied on him to support the valuable English wool trade. Edward conspired with Guy of Flanders to kidnap Floris. Floris was captured during a hunting party and taken to Muiderslot castle. Concerned about their safety the kidnappers attempted to take Floris to a safer location during which jounrney they were attacked by an angry mob of local peasants. Floris was killed.
On 8th January 1297 John Gerulfing I Count Holland [aged 13] and Princess Elizabeth of Rhuddlan Countess Essex, Hereford and Holland [aged 14] were married at Ipswich, Suffolk [Map]. She by marriage Countess Holland. The wedding was attended by her sister Margaret Plantagenet Duchess Brabant [aged 21], her father King Edward I [aged 57], her brother Edward [aged 12] and her future second husband Humphrey Bohun 4th Earl Hereford 3rd Earl Essex [aged 21]. She the daughter of King Edward I of England and Eleanor of Castile Queen Consort England. He the son of Floris Gerulfing V Count Holland and Beatrix Dampierre. They were half third cousin twice removed. He a great x 4 grandson of King Stephen I England.
In August 1297 Ralph Monthermer 1st Earl of Gloucester and Hertford [aged 27] was created 1st Earl Gloucester, 1st Earl Hertford. There is some uncertainty as to whether these creations existed, or were created for life only, since they do appear to have been inherited, or whether there is confusion around his having been married to [his sister-in-law] Joan of Acre Countess Gloucester and Hertford [aged 25], the widow of the seventh Earl of the first creation Gilbert "Red Earl" Clare 7th Earl Gloucester 6th Earl Hertford.
On 10th November 1299 John Gerulfing I Count Holland [aged 15] was killed by a mob.
On 14th November 1302 Humphrey Bohun 4th Earl Hereford 3rd Earl Essex [aged 26] and [his former wife] Princess Elizabeth of Rhuddlan Countess Essex, Hereford and Holland [aged 20] were married. She by marriage Countess Essex, Countess Hereford. Westminster Abbey [Map]. She the daughter of [his former father-in-law] King Edward I of England [aged 63] and Eleanor of Castile Queen Consort England. He the son of Humphrey Bohun 3rd Earl Hereford 2nd Earl Essex and Maud Fiennes Countess Essex and Hereford. They were third cousins.
On 5th May 1316 Isabel Bohun was born to Humphrey Bohun 4th Earl Hereford 3rd Earl Essex [aged 40] and [his former wife] Princess Elizabeth of Rhuddlan Countess Essex, Hereford and Holland [aged 33]. His mother Princess Elizabeth of Rhuddlan Countess Essex, Hereford and Holland died in childbirth. She was buried at Waldon Priory and Abbey [Map]. She a granddaughter of King Edward I of England.
Bourgeois de Valenciennes. Count John of Hainaut had much to do in his time, especially in Holland. And the Count of Holland1 died without a male heir of his body, and Count John of Hainaut was the eldest by right of his mother; but the King of Germany, who then was, wished to dispute this with him, and came to the borders of Holland with great numbers of men-at-arms to seize the land. And when Count John of Hainaut learned of this, he summoned his friends from all sides and went to meet the king vigorously, and so well and so competently did he conduct himself that they came to an agreement; and the counties of Holland and Zeeland remained peacefully with Count John of Hainaut, and he bore the quartered arms of Hainaut, Holland, and Zeeland.
Le conte Jehan de Haynault eult moult à faire en son tamps et nomméement en Holande, et le conte de Holande morut sans hoir masle de sa char, et le conte Jehan de Haynault estoit le plus aisné de par sa mère; mais le roy d’Allemaingne qui adont estoit, luy veult débatre et vint ès marches de Holande à grans gens d'armes pour le pays saisir. Et quant le conte Jehan de Haynault le sceult, il manda ses amis de toutes pars et alla encontre du roy vigorousement, et sy bien et sy souffisamment s’y maintint qu’ils furent d'accord, et demourèrent les contés de Holande et de Zélande au conte Jehan de Haynault paisiblement, et encharga les armes esquartelées de Haynault et Holande et Zélande.
Note 1. John, 1284-1299, I Count of Holland, married Elizabeth of Rhuddlan, daughter of King Edward I of England and Eleanor of Castile. When John died Albert, 1255-1308, King of Germany, attempted to seize Holland but he was resisted by John of Avesnes, II Count Hainaut and Holland, who succeeded John of Holland being his first cousin once-removed — John of Avesnes's mother Adelaide was sister of John of Holland's grandfather William. Albert was murdered in 1308 by his nephew John for his having forced his father Rudolph to forego his inheritance.
Kings Wessex: Great x 8 Grand Son of King Edmund "Ironside" I of England
Kings England: Great x 4 Grand Son of King Stephen I England
Kings Scotland: Great x 5 Grand Son of King David I of Scotland
Kings France: Great x 9 Grand Son of Hugh I King of the Franks
Kings Duke Aquitaine: Great x 13 Grand Son of Ranulf I Duke Aquitaine
Great x 4 Grandfather: Dirk Gerulfing VI Count Holland 
7 x Great Grandson of King Alfred "The Great" of Wessex
Great x 3 Grandfather: Floris Gerulfing III Count Holland 8 x Great Grandson of King Alfred "The Great" of Wessex
Great x 4 Grandmother: Sophie Salm Countess Holland
Great x 2 Grandfather: William Gerulfing I Count Holland Great Grandson of King David I of Scotland
Great x 4 Grandfather: Henry Dunkeld 3rd Earl Huntingdon 1st Earl of Northumbria 
son of King David I of Scotland
Great x 3 Grandmother: Ada Dunkeld Countess Holland Granddaughter of King David I of Scotland
Great x 4 Grandmother: Ada Warenne Countess Huntingdon and Northumbria 
3 x Great Granddaughter of Hugh I King of the Franks
Great x 1 Grandfather: Floris Gerulfing IV Count Holland 2 x Great Grandson of King David I of Scotland
Great x 4 Grandfather: Henry I Count Guelders
Great x 3 Grandfather: Otto I Count Guelders
Great x 4 Grandmother: Agnes Arnstein Countess Guelders
Great x 2 Grandmother: Adelaide Guelders Countess Holland
Great x 4 Grandfather: Otto Wittelsbach I Duke Bavaria 
Great x 3 Grandmother: Richardis Wittelsbach Countess Guelders
Great x 4 Grandmother: Agnes of Loon
Grandfather: William Gerulfing II Count Holland 2 x Great Grandson of King Stephen I England
Great x 4 Grandfather: Godfrey Reginar VII Duke Lower Lorraine 6 x Great Grandson of King Edward "Elder" of the Anglo Saxons
Great x 3 Grandfather: Godfrey Reginar VIII Duke Lower Lorraine 7 x Great Grandson of King Edward "Elder" of the Anglo Saxons
Great x 4 Grandmother: Lutgardis Sulzbach Duchess Lower Lorraine
Great x 2 Grandfather: Henry Reginar VIII Duke Lower Lorraine I Duke Brabant 8 x Great Grandson of King Edward "Elder" of the Anglo Saxons
Great x 4 Grandfather: Henry Luxemburg II Duke Limburg 
8 x Great Grandson of King Edward "Elder" of the Anglo Saxons
Great x 3 Grandmother: Margaret Luxemburg Duchess Lower Lorraine 9 x Great Granddaughter of King Edward "Elder" of the Anglo Saxons
Great x 4 Grandmother: Mathilda Saffenburg Duchess Limburg
Great x 1 Grandmother: Mathilde Reginar Countess Holland and Palatine Great Granddaughter of King Stephen I England
Great x 4 Grandfather: Thierry Count Flanders 3 x Great Grandson of Hugh I King of the Franks
Great x 3 Grandfather: Matthew Metz Count Boulogne 4 x Great Grandson of Hugh I King of the Franks
Great x 4 Grandmother: Sibylla Anjou Countess Essex 
9 x Great Granddaughter of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 2 Grandmother: Maud Metz Granddaughter of King Stephen I England
Great x 4 Grandfather: King Stephen I England 
Grandson of King William "Conqueror" I of England
Great x 3 Grandmother: Marie Blois I Countess Boulogne daughter of King Stephen I England
Great x 4 Grandmother: Matilda Flanders Granddaughter of King Malcolm III of Scotland
Father: Floris Gerulfing V Count Holland 3 x Great Grandson of King Stephen I England
Great x 1 Grandfather: Otto "Child" Brunswick-Lüneburg Duke Brunswick-Lüneburg
Grandmother: Elizabeth Brunswick-Lüneburg Countess Holland
John Gerulfing I Count Holland 4 x Great Grandson of King Stephen I England
Great x 4 Grandfather: Guy Dampierre 
Great x 3 Grandfather: William Dampierre
Great x 4 Grandmother: Helvide Baudémont
Great x 2 Grandfather: Guy Dampierre
Great x 1 Grandfather: William Dampierre II Count Flanders
Great x 3 Grandfather: Archambaud Bouron
Great x 2 Grandmother: Mathilde Bouron
Grandfather: Guy Dampierre Count Flanders 4 x Great Grandson of King William "Conqueror" I of England
Great x 4 Grandfather: Baldwin Flanders IV Count Hainaut 4 x Great Grandson of Hugh I King of the Franks
Great x 3 Grandfather: Baldwin Flanders V Count Hainaut 5 x Great Grandson of Hugh I King of the Franks
Great x 4 Grandmother: Alice Namur Countess Hainaut 6 x Great Granddaughter of King Edward "Elder" of the Anglo Saxons
Great x 2 Grandfather: Baldwin IX Count Flanders VI Count Hainaut 5 x Great Grandson of Hugh I King of the Franks
Great x 4 Grandfather: Thierry Count Flanders 3 x Great Grandson of Hugh I King of the Franks
Great x 3 Grandmother: Margaret Metz Countess Hainaut and Flanders 4 x Great Granddaughter of Hugh I King of the Franks
Great x 4 Grandmother: Sibylla Anjou Countess Essex 9 x Great Granddaughter of Charles "Charlemagne aka Great" King of the Franks King Lombardy Holy Roman Emperor
Great x 1 Grandmother: Margaret II Countess Flanders 3 x Great Granddaughter of King William "Conqueror" I of England
Great x 4 Grandfather: Theobald Blois II Count Champagne IV Count Blois Grandson of King William "Conqueror" I of England
Great x 3 Grandfather: Henry Blois I Count Champagne Great Grandson of King William "Conqueror" I of England
Great x 4 Grandmother: Matilda Carinthia Countess Champagne and Blois
Great x 2 Grandmother: Marie Blois Countess Flanders 2 x Great Granddaughter of King William "Conqueror" I of England
Great x 4 Grandfather: Louis VII King of the Franks 
3 x Great Grandson of Hugh I King of the Franks
Great x 3 Grandmother: Marie Capet Countess Champagne 4 x Great Granddaughter of Hugh I King of the Franks
Great x 4 Grandmother: Eleanor of Aquitaine Queen Consort Franks and England 4 x Great Granddaughter of Hugh I King of the Franks
Mother: Beatrix Dampierre 5 x Great Granddaughter of King William "Conqueror" I of England
Great x 4 Grandfather: William I Lord of Béthune
Great x 3 Grandfather: Robert "Le Roux" V Lord of Béthune
Great x 2 Grandfather: William "Red" Béthune II Lord Bethune
Great x 1 Grandfather: Robert VII Lord Bethune
Grandmother: Mathilde Bethune