Background
He was the oldest son of Sir Walter Borrowes, 4th Baronet and his wife Mary Pottinger, daughter of Captain Edward Pottinger.
He was the oldest son of Sir Walter Borrowes, 4th Baronet and his wife Mary Pottinger, daughter of Captain Edward Pottinger.
In 1741, Borrowes succeeded his father as baronet. Between 1745 and 1776, he represented Kildare County in the Irish House of Commons. Borrowes was also elected for Randalstown in 1760, but chose not to sit.
In 1751, he was appointed High Sheriff of Kildare.
In February 1759, Borrowes married Elizabeth Short, only daughter of John Short. The main Borrowes family seat was at Barretstown Castle near Ballymore Eustace.