Sir Gervase Clifton (d. 6 May 1471) of Clifton, Nottinghamshire and London was a 15th-century English knight and landowner. He was beheaded after the Battle of Tewkesbury.
Clifton served as Lieutenant of Dover Castle and as Captain of Pontoise, France where he was knighted. He came into an estate at Brabourne, Kent, by his marriage to an heiress, Isabel Herbert. He was Mayor of Canterbury in 1450, served as High Sheriff of Kent 1439, 1450 and 1458 and represented Kent in the Parliament of 1455.
He was declared a traitor for his support of Margaret of Anjou. He took part in and was captured at the Battle of Tewkesbury during the Wars of the Roses and was beheaded in Tewkesbury market place along with other Lancastrian leaders on 6 May 1471.
More information on the Wikipedia page [https://en.wikipedia.org/wiki/Gervase_Clifton_(died_1471).