In 1731 John Crichton 1st Earl Erne was born to Abraham Crichton 1st Baron Erne [aged 27].
On 10th May 1765 [his son] Abraham Crichton 2nd Earl Erne was born to John Crichton 1st Earl Erne [aged 34] and [his future wife] Mary Caroline Hervey Countess Erne [aged 12].
In 1768 [his father] Abraham Crichton 1st Baron Erne [aged 64] was created 1st Baron Erne of Crom Castle in Fermanagh.
On 10th June 1772 [his father] Abraham Crichton 1st Baron Erne [aged 68] died. His son John [aged 41] succeeded 2nd Baron Erne of Crom Castle in Fermanagh.
On 28th June 1772 [his son] John Crichton was born to John Crichton 1st Earl Erne [aged 41] and [his future wife] Mary Caroline Hervey Countess Erne [aged 19].
In 1776 John Crichton 1st Earl Erne [aged 45] and Mary Caroline Hervey Countess Erne [aged 23] were married. The difference in their ages was 22 years. She the daughter of Frederick Augustus Hervey 4th Earl Bristol [aged 45] and Elizabeth Davers Countess Bristol [aged 43].
In 1778 [his daughter] Elizabeth Caroline Mary Crichton Baroness Wharncliffe was born to John Crichton 1st Earl Erne [aged 47] and [his wife] Mary Caroline Hervey Countess Erne [aged 25]. She married 30th March 1799 her fifth cousin once removed James Archibald Stuart-Wortley-Mackenzie 1st Baron Wharncliffe and had issue.
The London Gazette 12146. 23rd December 1780. Also like Letters Patent, containing His Majesty's Grants of the Dignity of a Viscount of the said Kingdom unto the following Noblemen, and their Heirs Male, by the Names, Stiles and Titles as undermentioned, viz.
James Baron Lifford, His Majesty's Chancellor of Ireland, Viscount Lifford, of Lifford, in the County of Donegall.
Otway Lord Desart, Viscount Desart, of Desert, in the County of Kilkenny.
John Baron Erne [aged 49], Viscount Erne, of Crom Castle, in the County of Fermanagh. [[his wife] Mary Caroline Hervey Countess Erne [aged 27] by marriage Viscountess Erne of Crom Castle in County Fermanagh.]
Barry Lord Farnham, Viscount Farnham, of Farnham, in the County of Cavan.
Simon Lord Irnham [aged 67], Viscount Carhampton, of Castlehaven, in the County of Cork.
Bernard Lord Bangor [aged 61], Viscoount Bangor, of Castleward, in the County of Downe. [Ann Bligh Viscountess Bangor by marriage Viscountess Bangor of Castleward in County Downe.]
Penyston Lord Melbourne [aged 35], Viscount Melbourne, of Kilmore, in the County of Cavan. [Elizabeth Milbanke Viscountess Melbourne [aged 29] by marriage Viscountess Melbourne of Kilmore in County Cavan.]
James Lord Clifden [aged 46], Viscount Clifden, of Gowran, in the County of Kilkenny.
John Lord Naas [aged 80], Viscount Mayo, of Monecrouer.
In 1789 John Crichton 1st Earl Erne [aged 58] was created 1st Earl Erne of Crom Castle in County Fermanagh. [his wife] Mary Caroline Hervey Countess Erne [aged 36] by marriage Countess Erne of Crom Castle in County Fermanagh.
On 25th March 1795 Robert Jenkinson 2nd Earl Liverpool [aged 24] and [his sister-in-law] Louisa Theodosia Hervey Countess Liverpool [aged 28] were married at Wimbledon, Surrey. She the daughter of [his father-in-law] Frederick Augustus Hervey 4th Earl Bristol [aged 64] and [his mother-in-law] Elizabeth Davers Countess Bristol [aged 62]. He the son of Charles Jenkinson 1st Earl Liverpool [aged 65] and Amelia Watts.
Before 29th December 1798 Frederick William Hervey 1st Marquess of Bristol [aged 29] and Elizabeth Albana Upton [aged 23] were married. He the son of [his father-in-law] Frederick Augustus Hervey 4th Earl Bristol [aged 68] and [his mother-in-law] Elizabeth Davers Countess Bristol [aged 65].
On 30th March 1799 James Archibald Stuart-Wortley-Mackenzie 1st Baron Wharncliffe [aged 22] and Elizabeth Caroline Mary Crichton Baroness Wharncliffe [aged 21] were married. She the daughter of John Crichton 1st Earl Erne [aged 68] and Mary Caroline Hervey Countess Erne [aged 46]. They were fifth cousin once removed.
On 8th July 1803 Frederick Augustus Hervey 4th Earl Bristol [aged 72] died in Lazio. His son Frederick [aged 33] succeeded 5th Earl Bristol, 6th Baron Hervey of Ickworth in Suffolk. H3NG0wbdHis great grandson Charles [aged 4] succeeded 6th Baron Howard de Walden.
On 30th March 1806 Georgiana Spencer Duchess Devonshire [aged 48] died at Devonshire House [Map]. She was buried at Derby Cathedral [Map]. Her husband William Cavendish 5th Duke Devonshire [aged 58], her mother Margaret Georgiana Poyntz Countess Spencer [aged 68], her sister Henrietta Frances Spencer Countess Bessborough [aged 44] and her eight months pregnant daughter Georgiana Cavendish Countess Carlisle [aged 22] were present, as was Elizabeth Christiana Hervey Duchess Devonshire [aged 48], her husband's mistress and future wife.
On 17th December 1808 Charles Jenkinson 1st Earl Liverpool [aged 79] died. His son Robert [aged 38] succeeded 2nd Earl Liverpool, 2nd Baron Hawkesbury of Hawkesbury in Gloucestershire, 8th Baronet Jenkinson of Walcot in Oxfordshire and of Hawkesbury in Gloucestershire. [his sister-in-law] Louisa Theodosia Hervey Countess Liverpool [aged 41] by marriage Countess Liverpool.
In 1809 William Cavendish 5th Duke Devonshire [aged 61] and Elizabeth Christiana Hervey Duchess Devonshire [aged 51] were married. She by marriage Duchess Devonshire. She the daughter of [his father-in-law] Frederick Augustus Hervey 4th Earl Bristol and [his mother-in-law] Elizabeth Davers Countess Bristol. He the son of William Cavendish 4th Duke Devonshire and Charlotte Elizabeth Boyle Marchioness Hartington. They were sixth cousins.
In 1821 [his sister-in-law] Louisa Theodosia Hervey Countess Liverpool [aged 54] died.
In 1824 Elizabeth Christiana Hervey Duchess Devonshire [aged 66] died.
On 15th December 1828 John Crichton 1st Earl Erne [aged 97] died. His son Abraham [aged 63] succeeded 2nd Earl Erne of Crom Castle in County Fermanagh, 2nd Viscount Erne of Crom Castle in County Fermanagh, 3rd Baron Erne of Crom Castle in Fermanagh.
In 1842 [his former wife] Mary Caroline Hervey Countess Erne [aged 89] died.
Grandfather: David Crichton of Crom Castle
Father: Abraham Crichton 1st Baron Erne
Great x 4 Grandfather: John Southwell of Barham Hall 
Great x 3 Grandfather: Edmund Southwell
Great x 2 Grandfather: Thomas Southwell 1st Baronet
Great x 1 Grandfather: Richard Southwell of Castle Matrix
Grandmother: Catherine Southwell