Abraham Brewster PC (Ire) (April 1796 – 26 July 1874) was an Irish judge and Lord Chancellor of Ireland.

[2] Brewster was called to the Irish bar in 1819, and, having chosen Leinster for his circuit, soon acquired the reputation of a sound lawyer and a powerful speaker.

By the influence of his friend Sir James Graham, First Lord of the Admiralty, he was Attorney-General for Ireland from 10 January 1853 until the fall of the Aberdeen ministry on 10 February 1855.

By his marriage in 1819 with Mary Ann, daughter of Robert Gray of Upton House, County Carlow, who died in Dublin on 24 November 1862, he had issue one son, Colonel William Bagenal Brewster, and one daughter, Elizabeth Mary, wife of Mr. Henry French, both of whom died in the lifetime of their father.

Edward's brother John Grey Brewster also emigrated to Australia, where he became a prosperous grazier and company director: in later years he retired to England, where he died in 1897.