Kilmaine was the younger son of Sir John Browne, 5th Baronet of The Neale, and Margaret Dodwell.
His father was the de jure 5th Baronet, of The Neale, but like his predecessors had never assumed the title.
[1] In 1776 he was elected to the Irish House of Commons for Newtownards, a seat he held until 1783, and then represented Carlow as a Member of Parliament (MP) between 1783 and 1789.
In 1784, he purchased Gaulstown House from George Rochfort, 2nd Earl of Belvedere In 1789 he was raised to the Peerage of Ireland as Baron Kilmaine, of The Neale in the County of Mayo.
[3] Together, they were the parents of:[2] Lord Kilmaine died in June 1794, aged 68, and was succeeded in his titles by his eldest son James.