Background
Castlemaine was a younger son of the Very Reverend Richard Handcock, Dean of Archonry, and Sarah, daughter of Richard Toler.
Castlemaine was a younger son of the Very Reverend Richard Handcock, Dean of Archonry, and Sarah, daughter of Richard Toler.
He was educated at Trinity College, Dublin.
However, as this was an Irish peerage it did not entitle him to a seat in the House of Lords. Lord Castlemaine married Anne, daughter of Arthur French, in 1790. Lady Castlemaine died in November 1852.