On 19 Mar 1820 [her father] Richard William Penn Curzon Howe 1st Earl Howe (age 23) and Harriet Georgiana Brudenell Countess Howe (age 21) were married. She the daughter of Robert Brudenell 6th Earl Cardigan (age 50) and (age 50).
On 21 Mar 1820 Assheton Curzon 1st Viscount Curzon (age 90) died. His grandson [her father] Richard William Penn Curzon Howe 1st Earl Howe (age 23) succeeded 2nd Viscount Curzon of Penn in Buckinghamshire, 6th Baronet Curzon of Kedleston in Derbyshire.
In 1835 [her grandmother] Sophia Howe 2nd Baroness Howe died. Her son [her father] Richard William Penn Curzon Howe 1st Earl Howe (age 38) succeeded 3rd Baron Howe. Harriet Georgiana Brudenell Countess Howe (age 36) by marriage Baroness Howe.
On 09 Oct 1845 [her father] Richard William Penn Curzon Howe 1st Earl Howe (age 48) and [her mother] Anne Gore Countess Howe -1877 were married. She by marriage Countess Howe.
In 1848 Mary Anna Curzon Howe Duchess Abercorn was born to Richard William Penn Curzon Howe 1st Earl Howe (age 51) and Anne Gore Countess Howe -1877.
In 1869 James Hamilton 2nd Duke Abercorn (age 30) and Mary Anna Curzon Howe Duchess Abercorn (age 21) were married. She by marriage Duchess Abercorn. She the daughter of Richard William Penn Curzon Howe 1st Earl Howe (age 72) and Anne Gore Countess Howe -1877. He the son of James Hamilton 1st Duke Abercorn 1811-1885 (age 57) and Louisa Jane Russell Duchess Abercorn 1812-1905 (age 56). He a great x 4 grandson of King Charles II of England Scotland and Ireland. 
On 30 Nov 1869 [her son] James Albert Edward Hamilton 3rd Duke Abercorn 1869-1953 was born to [her husband] James Hamilton 2nd Duke Abercorn (age 31) and Mary Anna Curzon Howe Duchess Abercorn (age 21) at Hamilton Place.
On 12 May 1870 [her father] Richard William Penn Curzon Howe 1st Earl Howe (age 73) died. On 12 May 1870 His son [her half-brother] George Augustus Frederick Louis Curzon Howe 2nd Earl Howe 1821-1876 (age 49) succeeded 2nd Earl Howe, 3rd Viscount Curzon of Penn in Buckinghamshire, 7th Baronet Curzon of Kedleston in Derbyshire.
On 18 Oct 1871 [her son] Claud Penn Alexander Hamilton was born to [her husband] James Hamilton 2nd Duke Abercorn (age 33) and Mary Anna Curzon Howe Duchess Abercorn (age 23).
On 18 Oct 1871 [her son] Claud Penn Alexander Hamilton died.
On 10 Apr 1874 [her son] Charlie Hamilton died.
On 10 Apr 1874 [her son] Charlie Hamilton was born to [her husband] James Hamilton 2nd Duke Abercorn (age 35) and Mary Anna Curzon Howe Duchess Abercorn (age 26).
In 1876 [her daughter] Alexandra Phyllis Hamilton was born to [her husband] James Hamilton 2nd Duke Abercorn (age 37) and Mary Anna Curzon Howe Duchess Abercorn (age 28).
On 23 Jul 1877 [her mother] Anne Gore Countess Howe -1877 died.
On 20 Jul 1878 [her brother-in-law] Claud Hamilton (age 35) and Caroline Chandos-Pole (age 21) were married. He the son of James Hamilton 1st Duke Abercorn 1811-1885 (age 67) and Louisa Jane Russell Duchess Abercorn 1812-1905 (age 66). He a great x 4 grandson of King Charles II of England Scotland and Ireland. She a great x 5 granddaughter of King Charles II of England Scotland and Ireland.
On 25 Oct 1878 [her son] Claud Francis Hamilton was born to [her husband] James Hamilton 2nd Duke Abercorn (age 40) and Mary Anna Curzon Howe Duchess Abercorn (age 30).
On 25 Dec 1878 [her son] Claud Francis Hamilton died.
In 1880 [her daughter] Gladys Mary Hamilton Countess Wicklow 1880-1917 was born to [her husband] James Hamilton 2nd Duke Abercorn (age 41) and Mary Anna Curzon Howe Duchess Abercorn (age 32).
In 1883 [her son] Arthur John Hamilton was born to [her husband] James Hamilton 2nd Duke Abercorn (age 44) and Mary Anna Curzon Howe Duchess Abercorn (age 35).
On 31 Oct 1885 [her father-in-law] James Hamilton 1st Duke Abercorn 1811-1885 (age 74) died. His son [her husband] James Hamilton 2nd Duke Abercorn (age 47) succeeded 2nd Duke Abercorn, 2nd Marquess Hamilton.
On 31 Oct 1886 [her son] Unamed Hamilton died.
On 31 Oct 1886 [her son] Unamed Hamilton was born to [her husband] James Hamilton 2nd Duke Abercorn (age 48) and Mary Anna Curzon Howe Duchess Abercorn (age 38).
On 10 Nov 1889 [her son] Claud Nigel Hamilton was born to [her husband] James Hamilton 2nd Duke Abercorn (age 51) and Mary Anna Curzon Howe Duchess Abercorn (age 41).
On 01 Nov 1894 [her son] James Albert Edward Hamilton 3rd Duke Abercorn 1869-1953 (age 24) and [her daughter-in-law] Rosalind Cecilia Caroline Bingham Duchess Abercorn 1869-1958 (age 25) were married at St Paul's Church, Knightsbridge. She the daughter of Charles George Bingham 4th Earl Lucan 1830-1914 (age 64) and Cecilia Catherine Gordon-Lennox Countess Lucan 1838-1910 (age 56). He the son of James Hamilton 2nd Duke Abercorn (age 56) and Mary Anna Curzon Howe Duchess Abercorn 1848-1929 (age 46). They were third cousins. He a great x 5 grandson of King Charles II of England Scotland and Ireland. She a great x 5 granddaughter of King Charles II of England Scotland and Ireland. 
On 03 Jan 1913 [her husband] James Hamilton 2nd Duke Abercorn (age 74) died. His son [her son] James Albert Edward Hamilton 3rd Duke Abercorn 1869-1953 (age 43) succeeded 3rd Duke Abercorn. [her daughter-in-law] Rosalind Cecilia Caroline Bingham Duchess Abercorn 1869-1958 (age 43) by marriage Duchess Abercorn.
On 29 Oct 1914 [her son] Arthur John Hamilton (age 31) was killed.
On 10 Oct 1918 [her daughter] Alexandra Phyllis Hamilton (age 42) drowned whilst travelling from Dún Laoghaire, County Dublin to Holyhead, Anglesey aboard the mailboat RMS Leinster that was torpedoed and sunk by German submarine UB-123.
On 26 Jan 1925 [her former brother-in-law] Claud Hamilton (age 81) died.
In 1927 [her former brother-in-law] George Hamilton (age 82) died.
On 11 Aug 1928 [her former brother-in-law] Frederick Spencer Hamilton (age 71) died.
In 1929 Mary Anna Curzon Howe Duchess Abercorn (age 81) died.
Paternal Family Tree: Curzon
Maternal Family Tree: Georgiana Montagu
Kings Wessex: Great x 23 Grand Daughter of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 19 Grand Daughter of Owain "Great" King Gwynedd 1100-1170
Kings Seisyllwg: Great x 25 Grand Daughter of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 20 Grand Daughter of Maredudd ap Bleddyn King Powys 1047-1132
Kings England: Great x 12 Grand Daughter of King Henry IV of England
Kings Scotland: Great x 18 Grand Daughter of William "Lion" I King Scotland
Kings Franks: Great x 19 Grand Daughter of Louis VII King Franks
Kings France: Great x 15 Grand Daughter of Philip "The Fair" IV King France
Great x 4 Grandfather: John Curzon 1st Baronet 6 x Great Grand Son of Henry IV King England
Great x 3 Grandfather: Nathaniel Curzon 2nd Baronet 7 x Great Grand Son of Henry IV King England
Great x 4 Grandmother: Patience Crewe Baroness Curzon
Great x 2 Grandfather: Nathaniel Curzon 4th Baronet 8 x Great Grand Son of Henry IV King England
Great x 4 Grandfather: William Penn
Great x 3 Grandmother: Sarah Penn Baroness Curzon
Great x 1 Grandfather: Assheton Curzon 1st Viscount Curzon 9 x Great Grand Son of Henry IV King England
Great x 4 Grandfather: Ralph Assheton 1st Baronet
Great x 3 Grandfather: Ralph Assheton 2nd Baronet
Great x 2 Grandmother: Mary Assheton Baroness Curzon 15 x Great Grand Daughter of King Henry III of England
Great x 4 Grandfather: Thomas Vavasour
13 x Great Grand Son of King Henry III of England
Great x 3 Grandmother: Mary Vavasour Lady Assheton 14 x Great Grand Daughter of King Henry III of England
GrandFather: Penn Curzon 10 x Great Grand Son of Henry IV King England
Great x 4 Grandfather: Thomas Hanmer
Great x 3 Grandfather: William Hanmer
Great x 2 Grandfather: William Hanmer
Great x 1 Grandmother: Esther Hanmer Baroness Curzon
Father: Richard William Penn Curzon Howe 1st Earl Howe 11 x Great Grand Son of Henry IV King England
Great x 4 Grandfather: John Grobham Howe
Great x 3 Grandfather: Scrope Howe 1st Viscount Howe 9 x Great Grand Son of King Edward III of England
Great x 4 Grandmother: Annabella Scrope
8 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: Emanuel Howe 2nd Viscount Howe 9 x Great Grand Son of King Edward III of England
Great x 4 Grandfather: William Alington 1st Baron Alington 12 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandmother: Juliana Alington Viscountess Howe 8 x Great Grand Daughter of King Edward III of England
Great x 4 Grandmother: Elizabeth Tollemache Baroness Alington
7 x Great Grand Daughter of King Edward III of England
Great x 1 Grandfather: Richard Howe 1st Earl Howe 10 x Great Grand Son of King Edward III of England
GrandMother: Sophia Howe 2nd Baroness Howe 11 x Great Grand Daughter of King Edward III of England
Mary Anna Curzon Howe Duchess Abercorn 1848-1929 12 x Great Grand Daughter of Henry IV King England
Great x 4 Grandfather: John Gore
Great x 3 Grandfather: Ralph Gore
Great x 2 Grandfather: William Gore
Great x 1 Grandfather: John Gore
GrandFather: John Gore
Mother: Anne Gore Countess Howe -1877 16 x Great Grand Daughter of King Edward "Longshanks" I of England
Great x 4 Grandfather: James Montagu
11 x Great Grand Son of King Edward "Longshanks" I of England
Great x 3 Grandfather: James Montagu 12 x Great Grand Son of King Edward "Longshanks" I of England
Great x 4 Grandmother: Diana Hungerford
15 x Great Grand Daughter of King John "Lackland" of England
Great x 2 Grandfather: John Montagu 13 x Great Grand Son of King Edward "Longshanks" I of England
Great x 1 Grandfather: George Montagu 14 x Great Grand Son of King Edward "Longshanks" I of England
GrandMother: Georgiana Montagu 15 x Great Grand Daughter of King Edward "Longshanks" I of England
