On 30 Apr 1766 [her grandfather] Thomas Pakenham 1st Baron Longford (age 52) died. His son [her father] Edward Pakenham 2nd Baron Longford (age 23) succeeded 2nd Baron Longford.
In 1768 [her father] Edward Pakenham 2nd Baron Longford (age 24) and [her mother] Catherine Rowley Baroness Longford (age 20) were married. She by marriage Baroness Longford. He the son of Thomas Pakenham 1st Baron Longford and (age 48).
On 14 Jan 1773 Catherine "Kitty" Pakenham Duchess Wellington was born to Edward Pakenham 2nd Baron Longford (age 29) and Catherine Rowley Baroness Longford (age 25) at Dublin [Map].
On 07 Jan 1790 Henry Fitzroy (age 24) and [her future sister-in-law] 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 03 Jun 1792 [her father] Edward Pakenham 2nd Baron Longford (age 49) died. His son [her brother] Thomas Pakenham 2nd Earl Longford (age 18) succeeded 3rd Baron Longford.
On 02 Aug 1799 Charles Culling Smith (age 24) and [her future sister-in-law] 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 future brother-in-law] Reverend Gerald Valerian Wellesley (age 31) and 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 Arthur Wellesley 1st Duke Wellington (age 36) and Catherine "Kitty" Pakenham Duchess Wellington (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).
On 03 Feb 1807 [her son] Arthur Wellesley 2nd Duke Wellington was born to [her husband] Arthur Wellesley 1st Duke Wellington (age 37) and Catherine "Kitty" Pakenham Duchess Wellington (age 34) at Harley Street Marylebone.
On 16 Jan 1808 [her son] Charles Wellesley was born to [her husband] Arthur Wellesley 1st Duke Wellington (age 38) and Catherine "Kitty" Pakenham Duchess Wellington (age 35).
Between 27 Jul 1809 and 28 Jul 1809 the Battle of Talavera, part of the Peninsular War, was fought between an Anglo Spanish army commanded by [her husband] Arthur Wellesley 1st Duke Wellington (age 40) against the French. The French army withdrew at night after several of its attacks had been repulsed. Following the battle Arthur Wellesley 1st Duke Wellington (age 40) was created 1st Viscount Wellington of Talavera.
Hugh Gough 1st Viscount Gough (age 29) commanded the 2nd Battalion of the 87th (Royal Irish Fusiliers) Regiment of Foot.
General Henry Fane (age 30) commanded the 3rd Prince of Wales Dragoon Guards, 4th Queen's Own Dragoons.
Before 1810 [her brother-in-law] Henry Wellesley 1st Baron Cowley (age 36) and 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).
On 11 May 1814 [her husband] Arthur Wellesley 1st Duke Wellington (age 45) was created 1st Duke Wellington. Catherine "Kitty" Pakenham Duchess Wellington (age 41) by marriage Duchess Wellington.
In 1816 [her mother] Catherine Rowley Baroness Longford (age 68) died.
Before 1821 [her brother-in-law] Henry Wellesley 1st Baron Cowley (age 47) and 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.
In Jan 1828 [her brother-in-law] Henry Wellesley 1st Baron Cowley (age 54) was created 1st Baron Cowley. Georgiana Charlotte Augusta Cecil Baroness Cowley by marriage Baroness Cowley.
On 24 Apr 1831 Catherine "Kitty" Pakenham Duchess Wellington (age 58) died.
On 14 Sep 1852 [her former husband] Arthur Wellesley 1st Duke Wellington (age 83) died at Deal Castle [Map]. His son [her son] Arthur Wellesley 2nd Duke Wellington (age 45) succeeded 2nd Duke Wellington, 2nd Viscount Wellington of Talavera. Elizabeth Hay Duchess Wellington 1820-1904 (age 31) by marriage Duchess Wellington.
Paternal Family Tree: Pakenham
Great x 4 Grandfather: Robert Pakenham
Great x 3 Grandfather: Henry Pakenham
Great x 2 Grandfather: Thomas Pakenham
Great x 1 Grandfather: Edward Pakenham
GrandFather: Thomas Pakenham 1st Baron Longford
Catherine "Kitty" Pakenham Duchess Wellington 1773-1831
GrandFather: Hercules Langford Rowley 1st Earl Langford
Mother: Catherine Rowley Baroness Longford
GrandMother: Elizabeth Rowley 1st Viscountess Langford