[1] Thomas Alston was the eldest son of Sir Rowland Alston, 4th Baronet of Odell, Bedfordshire,[1][2] by his wife, Elizabeth Raynes.
He was born on 23 March 1724 and baptised at St. James Church, Westminster nearly one month later, 22 April 1724.
In 1750 he married Catherine Davie Bovey, but separated from her by mutual consent two years later.
Horace Walpole reported a sorry appearance in the House of Commons in November 1755: "Poor Alston was mad, and spoke ten times to order.
Alston died 18 July 1774, leaving his property (Odell Castle) to his housekeeper Margaret Lee, through whom it eventually made its way to his illegitimate son Thomas.