Background
Blennerhassett was born at Castle Conway in County Kerry, the eldest son of John "Black Jack" Blennerhassett and Elizabeth Cross.
Blennerhassett was born at Castle Conway in County Kerry, the eldest son of John "Black Jack" Blennerhassett and Elizabeth Cross.
Trinity College.
He was the grandson of Robert Blennerhassett. He was educated at Trinity College, Dublin, before entering Middle Temple in London in 1710. He died prematurely at the age of 30.
He was a practising lawyer and was invested as a member of the King"s Counsel. He served as the Member of Parliament for Tralee from 1723 to 1725.