Thomas Homan Mulock Molloy was born on 5 May 1798 to parents, Elizabeth Homan Mulock and Laurence Bomford Molloy. He was educated at Trinity College, Dublin, achieving a B.A. in 1818, M.A. in 1825 and M.D. in 1826. On 5 February 1828 he married Frances Sophia Berry, daughter of John Berry, and Elizabeth Bury, daughter of William Bury, uncle of the 1st earl of Charleville. Together they had fifteen children; Frances Elizabeth, Thomas Homan Mulock, John Berry, Elizabeth Georgina, Thomas Lawrence, Richard Homan, Mary Mulock, Lawrence Bomford, William Bury, Hester Jane, Anne Homan, Henry Pilkington, Homan, Francis Berry, and George Phillips.
In 1843, Thomas Homan Mulock Molloy inherited Bellair House and estate from his uncle, Thomas Homan Mulock. He was directed on becoming entitled to the estates to take the sole name and arms of Homan-Mulock. He served as Justice of the Peace for King’s County, and he was later appointed High Sheriff for the County in 1849. Following the Famine years, many of the tenants had immigrated to America or died, the estate was in poor condition. Thomas Homan Mulock Molloy died at Bellair on 25 June 1889, and was buried at Liss.