Around 1695 [his father] William Herbert 2nd Marquess Powis 1660-1745 (age 35) and [his mother] Mary Preston Marchioness Powis were married. He the son of William Herbert 1st Marquess Powis (age 69) and Elizabeth Somerset Marchioness Powis. They were third cousin once removed.
On 02 Jun 1696 [his grandfather] William Herbert 1st Marquess Powis (age 70) died. His son [his father] William Herbert 2nd Marquess Powis 1660-1745 (age 36) succeeded 2nd Marquess Powis, 2nd Earl Powis, 4th Baron Powis of Powis Castle in Powys, 3rd Baronet Powis of Red Castle in Montgomeryshire. [his mother] Mary Preston Marchioness Powis by marriage Marchioness Powis. Mary Preston Marchioness Powis by marriage Marchioness Powis.
In 1698 William Herbert 3rd Marquess Powis was born to William Herbert 2nd Marquess Powis 1660-1745 (age 38) and Mary Preston Marchioness Powis.
On 08 Jan 1724 [his mother] Mary Preston Marchioness Powis died.
On 22 Oct 1745 [his father] William Herbert 2nd Marquess Powis 1660-1745 (age 85) died. His son William Herbert 3rd Marquess Powis (age 47) succeeded 3rd Marquess Powis, 3rd Earl Powis, 5th Baron Powis of Powis Castle in Powys, 4th Baronet Powis of Red Castle in Montgomeryshire.
On 08 Mar 1748 William Herbert 3rd Marquess Powis (age 50) died unmarried. Marquess Powis, Earl Powis, 6th Baron Powis of Powis Castle in Powys, 5th Baronet Powis of Red Castle in Montgomeryshire extinct.
Paternal Family Tree: Herbert
Maternal Family Tree: Mary Molyneux 1642-1673
Kings Wessex: Great x 20 Grand Son of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 17 Grand Son of Owain "Great" King Gwynedd 1100-1170
Kings Seisyllwg: Great x 22 Grand Son of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 18 Grand Son of Maredudd ap Bleddyn King Powys 1047-1132
Kings England: Great x 10 Grand Son of King Edward III of England
Kings Scotland: Great x 15 Grand Son of William "Lion" I King Scotland
Kings Franks: Great x 16 Grand Son of Louis VII King Franks
Kings France: Great x 12 Grand Son of Philip "The Fair" IV King France
Great x 4 Grandfather: William Herbert 1st Earl Pembroke
Great x 3 Grandfather: Edward Herbert 6 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Anne Parr Countess Pembroke
5 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: William Herbert 1st Baron Powis 7 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Thomas Stanley
Great x 3 Grandmother: Mary Stanley
Great x 4 Grandmother: Joyce Barrett
Great x 1 Grandfather: Percy Herbert 2nd Baron Powis 7 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Thomas Percy
4 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Henry Percy 8th Earl of Northumberland 5 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Eleanor Harbottle 5 x Great Grand Daughter of King Edward III of England
Great x 2 Grandmother: Eleanor Percy Baroness Herbert 6 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: John Neville 4th Baron Latimer of Snape 5 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Katherine Neville Countess Northumberland 6 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Lucy Somerset Baroness Latimer Snape 5 x Great Grand Daughter of King Edward III of England
GrandFather: William Herbert 1st Marquess Powis 8 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: William Craven
Great x 2 Grandfather: William Craven
Great x 1 Grandmother: Elizabeth Craven Baroness Herbert
Great x 3 Grandfather: William Whitmore of Balmes Manor in Hackney
Great x 2 Grandmother: Elizabeth Whitmore
Great x 3 Grandmother: Anne Bond
Father: William Herbert 2nd Marquess Powis 1660-1745 9 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: William Somerset 3rd Earl of Worcester 5 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Edward Somerset 4th Earl of Worcester 6 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Christina North Countess of Worcester -1558
Great x 2 Grandfather: Henry Somerset 1st Marquess Worcester 1577-1646 7 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Francis Hastings 2nd Earl Huntingdon
5 x Great Grand Son of King Edward III of England
Great x 3 Grandmother: Elizabeth Hastings Countess of Worcester 1546-1621 6 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Catherine Pole Countess Huntingdon 5 x Great Grand Daughter of King Edward III of England
Great x 1 Grandfather: Edward Somerset 2nd Marquess Worcester 8 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Francis Russell 2nd Earl Bedford
Great x 3 Grandfather: John Russell 9 x Great Grand Son of King John "Lackland" of England
Great x 4 Grandmother: Margaret St John Countess Bedford
8 x Great Grand Daughter of King John "Lackland" of England
Great x 2 Grandmother: Anne Russell 2nd Marchioness Worcester 1578-1639 10 x Great Grand Daughter of King John "Lackland" of England
Great x 4 Grandfather: Anthony Cooke
Great x 3 Grandmother: Elizabeth Cooke 14 x Great Grand Daughter of King Henry I "Beauclerc" England
Great x 4 Grandmother: Anne Fitzwilliam
13 x Great Grand Daughter of King Henry I "Beauclerc" England
GrandMother: Elizabeth Somerset Marchioness Powis 9 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Robert Dormer 1st Baron Dormer
Great x 3 Grandfather: William Dormer 7 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Elizabeth Browne Baroness Dormer
6 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: Robert Dormer 1st Earl Carnarvon 1610-1643 8 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: Richard Molyneux 1st Baronet
9 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandmother: Alice Molyneux 10 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandmother: Frances Gerard Lady Molyneux
Great x 1 Grandmother: Elizabeth Dormer 9 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Henry Herbert 2nd Earl Pembroke 6 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Philip Herbert 4th Earl Pembroke 1st Earl Montgomery 7 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Mary Sidney Countess Pembroke 1561-1621
9 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 2 Grandmother: Anne Sophia Herbert Countess Carnarvon 8 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Edward de Vere 17th Earl of Oxford
7 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandmother: Susan Vere Countess Montgomery 8 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandmother: Anne Cecil Countess of Oxford
15 x Great Grand Daughter of King Henry I "Beauclerc" England
William Herbert 3rd Marquess Powis 1698-1748 10 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: John Preston
Great x 3 Grandfather: Thomas Preston
Great x 2 Grandfather: John Preston
Great x 1 Grandfather: John Preston 1st Baronet
GrandFather: Thomas Preston 3rd Baronet
Mother: Mary Preston Marchioness Powis 13 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: William Molyneux 8 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandfather: Richard Molyneux 1st Baronet 9 x Great Grand Son of King Edward "Longshanks" I of England
Great x 2 Grandfather: Richard Molyneux 1st Viscount Molyneux 10 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandfather: Gilbert Gerard
Great x 3 Grandmother: Frances Gerard Lady Molyneux
Great x 4 Grandmother: Anne Ratclyffe
Great x 1 Grandfather: Caryll Molyneux 3rd Viscount Molyneux 11 x Great Grand Son of King Edward "Longshanks" I of England
GrandMother: Mary Molyneux 12 x Great Grand Daughter of King Edward "Longshanks" I of England