He was the son of Sir Robert Deane, 2nd Baronet of Muskerry and Springfield Castle, County Limerick by his wife Anne Brettridge, one of the three daughters and co-heiresses of Captain Roger Brettridge (1630-1683) of Castles Brettridge, Cope and Magner, County Cork and his wife Jane Hakby.
[3] He served as High Sheriff of County Cork for 1714 [4] and sat in the Irish House of Commons for Charleville from 1713 to 1715.
[1] He was again a Member of Parliament (MP) for County Cork from 1728 until his death in 1747.
[6] Deane was succeeded in the baronetcy by his oldest son Matthew.
[7] On the latter's death in 1751 the title devolved to the third son Robert.