Sir Donough O'Brien, 1st Baronet (1642 – 17 November 1717) was an Irish politician and baronet.
He was the son of Connor O'Brien and his wife Mary McMahon. In 1692, O'Brien entered the Irish House of Commons, sitting for Clare until 1714.[1]
He married firstly Lucia Hamilton, daughter of Sir George Hamilton and had one son named Lucius O'Brien. Lucius was the father of Sir Edward O'Brien, 2nd Baronet.[2] Secondly he married Elizabeth Deane, daughter of Major Joseph Deane and together they had one son named Henry O'Brien. When Murrough O'Brien, 1st Earl of Inchiquin was captured Lady Inchiquin petitioned for her husband's release but Sir Donough O'Brien wrote that she had no mind to see any of his relations "for his being a papist".[3]
| Parliament of Ireland | ||
|---|---|---|
| Preceded by Patriot Parliament |
Member of Parliament for Clare 1692–1714 With: Sir Joseph Williamson 1692–1693 Sir Henry Ingoldsby, 1st Bt 1695-1699 Lucius O'Brien 1703–1714 |
Succeeded by Francis Gore John Ivers |
| Peerage of Ireland | ||
| New creation | Baronet (of Leaghmenagh) 1686–1717 |
Succeeded by Edward O'Brien |