Sir Donough O'Brien, 1st Baronet [SEP] noble title
Sir Donough O'Brien, 1st Baronet
Sir Donough O'Brien, 1st Baronet of Leameneh (1642 – 17 November 1717) was an Irish politician and baronet.
He was the son of Connor O'Brien and his wife Maire Rua McMahon. In 1692, O'Brien entered the Irish House of Commons, sitting for Clare until 1714.
He married firstly Lucia Hamilton, daughter of Sir George Hamilton and had two sons, Brian O'Brien and Lucius O'Brien. Lucius (who pre-deceased him) was the father of Sir Edward O'Brien,
was one of the ten named in Act for the Settlement of Ireland 1652 as leaders of the Royalist forces in Ireland. In 1658 Charles II granted him the title of Earl of Clancarty. 
Birth and origins.
He was born in 1594 as a son of Charles MacCarty and his wife Margaret O'Brien. His father was the 1st Viscount of Muskerry. His grandfather was Sir Cormac MacCarthy, who had received an English title to his lands towards the end of the 16th century during the Tudor conquest of Ireland. Donough MacCarthy