Louisa married William Brabazon Ponsonby on 14 Dec 1769 in St. Anne, Dublin, County Dublin, Ireland. William (son of John Ponsonby and Elizabeth Cavendish) was born on 15 September 1744 in Co, Kilkenny, Ireland; died on 5 November 1806 in London, London, England. [Group Sheet] [Family Chart]

1. Rt. Hon. John Brabazon Ponsonby, 1st Viscount, 2nd Baron was born in 1770 in Bessborough, Kilkenny, Ireland; died on 21 Feb 1855 in Brighton, Sussex, England.
2. Rt. Rev. Richard Ponsonby was born in 1772 in Youghalpark, Ardagh, Cork, barony of Imokilly, Munster ( Youghal ) Ireland ; died on 27 Oct 1853 in Londonderry.
3. Major General Hon Sir William Ponsonby was born on 13 Oct 1772 in Co, Kilkenny, Ireland; died on 18 Jun 1815 in KIA Battle of Waterloo, Belgium.
4. George Ponsonby was born in 1774 in Imokilly, Cork, Ireland; died on 5 Jun 1863 in Woolbeding, Sussex, England.
5. Mary Elizabeth Ponsonby was born on 03 Mar 1775 in 4 Mar 1776 DIFFERENT Holy Trinity, Whitehaven, Cumberland, England; died on 26 Nov 1861 in London, England.
6. Frederick Ponsonby was born about 1776; died on 26 Jun 1849 in Ireland.