Eliza Biddulph was the eldest daughter of Francis Biddulph, of Vicarstown, Queen’s County, and Eliza Harrison, of Leeds. Her mother was described, at the time of her marriage to Francis Biddulph, in the Leeds Intelligencer of 19th February 1765 as ‘a most agreeable young lady with a handsome fortune.’
Thomas William, born 19th October 1788, died before 1828.
Richard Grattan, born 29th January 1790 in Queen’s County.
Eliza Catherine, born 8th January 1791, died by 1828.
Frank, born 13th December 1791.
William, born 17th November 1792, died by 1828.
Catherine, born 17th b June 1794.
Eleanor, born 12th December 1795.
Thomas Grattan, born 27th September 1796 in Dublin.
Frances, born 19th December 1797, died by 1828.
Harriet Grattan, born 16th September 1799 in Dublin, died by 1828.
John Grattan, born 22nd October 1800 in Dublin.
Henry Grattan, born 22nd January1803, Dublin.
Edward, born 22nd February 1804.
Frances [Fanny] Grattan who was born 15th June 1805. She married William Willis in Limerick in 1826, and died in Dublin in 1866, aged 61. Deaths. Willis, May 27, at her house, 1 Sandford Avenue, Dublin, Frances, widow of the Rev. William Willis, M.D., formerly of Charleville, County Cork, and daughter of the late Richard Grattan, Esq., J.P., Drummin House, County Kildare.
Anne Grattan, who was born 3rd November 1806 in Dublin. She was married in St. George’s Church, Dublin on 12th September 1850, to George Cooke.
Nicholas Grattan was born 23rd March 1808.
 The Belfast Newsletter, 1866, May 29.Eliza Grattan’s date of death and her burial place are unknown. Possibly she is buried in Carbery graveyard, close to the Colley mausoleum.