William Nugent Macnamara

William Nugent Macnamara or M'Namara (c. 1776 – 11 November 1856) was an Irish landowner and Member of Parliament.

He was the eldest son of Irish MP Francis Macnamara of Doolin and was educated at a Dublin seminary.

He was appointed High Sheriff of Clare for 1798–99, successfully keeping order during the Irish rebellion, and succeeded his father in 1815 as landlord of Doolin.

He had married Susannah, daughter and co-heiress of the High Court judge Matthias Finucane of Lifford and Ann O'Brien of Ennistymon House (her parents were divorced, an unusual step for the time), with whom he had a son, Francis, and four daughters.

He was succeeded by Francis, an Army officer who had been an Repeal Association MP for Ennis.