On 23 Jun 1742 Anne Hill Countess Mornington was born to Arthur Hill aka Hill-Trevor 1st Viscount Dungannon (age 48).
On 06 Feb 1759 Garrett Wellesley 1st Earl Mornington (age 23) and Anne Hill Countess Mornington (age 16) were married. She by marriage Baroness Mornington.
On 20 Jun 1760 [her son] Richard Wellesley 1st Marquess Wellesley was born to [her husband] Garrett Wellesley 1st Earl Mornington (age 24) and Anne Hill Countess Mornington (age 17) at Dungan Castle, Dungan, County Meath.
On 02 Oct 1760 [her husband] Garrett Wellesley 1st Earl Mornington (age 25) was created 1st Earl Mornington, 1st Viscount Wellesley of Dangan Castle by King George III of Great Britain and Ireland (age 22) in reward for his services to music and philanthropy. Anne Hill Countess Mornington (age 18) by marriage Countess Mornington.
On 20 May 1763 [her son] William Wellesley aka Wellesley-Pole 3rd Earl Mornington was born to [her husband] Garrett Wellesley 1st Earl Mornington (age 27) and Anne Hill Countess Mornington (age 20). His great uncle William Pole of Ballyfin in Ireland (age 50) was his godfather.
On 17 Feb 1766 [her father] Arthur Hill aka Hill-Trevor 1st Viscount Dungannon (age 72) was created 1st Viscount Dungannon, 1st Baron Hill of Olderfleet.
On 31 Jan 1768 [her father-in-law] Richard Colley aka Wesley 1st Baron Mornington (age 78) died. His son [her husband] Garrett Wellesley 1st Earl Mornington (age 32) succeeded 2nd Baron Mornington.
On 13 Mar 1768 [her daughter] Anne Wellesley was born to [her husband] Garrett Wellesley 1st Earl Mornington (age 32) and Anne Hill Countess Mornington (age 25).
On 01 May 1769 [her son] Arthur Wellesley 1st Duke Wellington was born to [her husband] Garrett Wellesley 1st Earl Mornington (age 33) and Anne Hill Countess Mornington (age 26) at Dublin [Map].
On 07 Dec 1770 [her son] Reverend Gerald Valerian Wellesley was born to [her husband] Garrett Wellesley 1st Earl Mornington (age 35) and Anne Hill Countess Mornington (age 28) at Dungan Castle, Dungan, County Meath.
On 30 Jan 1771 [her father] Arthur Hill aka Hill-Trevor 1st Viscount Dungannon (age 77) died. His grandson Arthur Hill-Trevor 2nd Viscount Dungannon (age 7) succeeded 2nd Viscount Dungannon.
On 20 Jan 1773 [her son] Henry Wellesley 1st Baron Cowley was born to [her husband] Garrett Wellesley 1st Earl Mornington (age 37) and Anne Hill Countess Mornington (age 30).
On 22 May 1781 [her husband] Garrett Wellesley 1st Earl Mornington (age 45) died at Kensington. He was buried at Grosvenor Chapel. On 22 May 1781 His son [her son] Richard Wellesley 1st Marquess Wellesley (age 20) succeeded 2nd Earl Mornington, 2nd Viscount Wellesley of Dangan Castle.
In 1784 [her son] William Wellesley aka Wellesley-Pole 3rd Earl Mornington (age 20) and [her daughter-in-law] Katherine Forbes Countess Mornington 1761- (age 22) were married. He the son of Garrett Wellesley 1st Earl Mornington and Anne Hill Countess Mornington 1742-1831 (age 41).
On 07 Jan 1790 [her son-in-law] Henry Fitzroy (age 24) and [her daughter] Anne Wellesley (age 21) were married. She the daughter of Garrett Wellesley 1st Earl Mornington and Anne Hill Countess Mornington 1742-1831 (age 47). He a great x 3 grandson of King Charles II of England Scotland and Ireland. 
On 29 Nov 1794 [her son] Richard Wellesley 1st Marquess Wellesley (age 34) and [her daughter-in-law] Hyacinthe Gabrielle Roland Marchioness Wellesley (age 28) were married at St George's Church, Hanover Square. She by marriage Countess Mornington. He the son of Garrett Wellesley 1st Earl Mornington and Anne Hill Countess Mornington 1742-1831 (age 52).
On 02 Aug 1799 [her son-in-law] Charles Culling Smith (age 24) and [her daughter] Anne Wellesley (age 31) were married. She the daughter of Garrett Wellesley 1st Earl Mornington and Anne Hill Countess Mornington 1742-1831 (age 57).
On 02 Jun 1802 [her son] Reverend Gerald Valerian Wellesley (age 31) and [her daughter-in-law] Emily Maud Cadogan (age 29) were married. She the daughter of Charles Sloane Cadogan 1st Earl Cadogan (age 73) and Mary Churchill Countess Cadogan 1758- (age 44). He the son of Garrett Wellesley 1st Earl Mornington and Anne Hill Countess Mornington 1742-1831 (age 59).
On 10 Apr 1806 [her son] Arthur Wellesley 1st Duke Wellington (age 36) and [her daughter-in-law] Catherine "Kitty" Pakenham Duchess Wellington 1773-1831 (age 33) were married at Dublin [Map]. He the son of Garrett Wellesley 1st Earl Mornington and Anne Hill Countess Mornington 1742-1831 (age 63).
Before 1810 [her son] Henry Wellesley 1st Baron Cowley (age 36) and [her daughter-in-law] Charlotte Cadogan Marchioness Anglesey (age 28) were married. She the daughter of Charles Sloane Cadogan 1st Earl Cadogan and Mary Churchill Countess Cadogan 1758- (age 51). He the son of Garrett Wellesley 1st Earl Mornington and Anne Hill Countess Mornington 1742-1831 (age 67).
Before 1821 [her son] Henry Wellesley 1st Baron Cowley (age 47) and [her daughter-in-law] Georgiana Charlotte Augusta Cecil Baroness Cowley were married. She the daughter of James Cecil 1st Marquess Salisbury (age 72) and Mary Amelia Hill Marchioness Salisbury 1750-1835 (age 70). He the son of Garrett Wellesley 1st Earl Mornington and Anne Hill Countess Mornington 1742-1831 (age 78). They were second cousin once removed.
On 29 Oct 1825 [her son] Richard Wellesley 1st Marquess Wellesley (age 65) and [her daughter-in-law] (age 37) were married. She by marriage Marchioness Wellesley. The difference in their ages was 27 years. He the son of Garrett Wellesley 1st Earl Mornington and Anne Hill Countess Mornington 1742-1831 (age 83).
She one of the four Caton sisters, daughters of Richard Caton (age 62), a merchant from Baltimore, the three eldest, known as the "The Three American Graces", married European husbands husbands. Only the fourth daughter Emily Caton (age 30) had children.
(age 37) married Richard Wellesley 1st Marquess Wellesley (age 65),
Elizabeth Caton Baroness Stafford (age 35) married George William Stafford-Jerningham 8th Baron Stafford (age 54),
(age 32) married firstly Felton Elwell Hervey-Bathurst 1st Baronet and secondly Francis Godolphin Osborne 7th Duke Leeds (age 27).
Emily Caton (age 30) married Consul John MacTavish (age 38).
In Jan 1828 [her son] Henry Wellesley 1st Baron Cowley (age 54) was created 1st Baron Cowley. [her daughter-in-law] Georgiana Charlotte Augusta Cecil Baroness Cowley by marriage Baroness Cowley.
On 10 Sep 1831 Anne Hill Countess Mornington (age 89) died at Henrietta Street Covent Garden. She was buried at Grosvenor Chapel.
Paternal Family Tree: Hill
Maternal Family Tree: Anne Hill Countess Mornington 1742-1831
Great x 4 Grandfather: Robert Hill
Great x 3 Grandfather: Moyses Hill Marshall of Ulster
Great x 2 Grandfather: Arthur Hill
Great x 1 Grandfather: William Hill
GrandFather: Michael Hill
Father: Arthur Hill aka Hill-Trevor 1st Viscount Dungannon
Great x 1 Grandfather: John Trevor Speaker 
GrandMother: Anne Trevor