Gregory Fiennes, 10th Baron Dacre (bef. 25 June 1539 – 25 September 1594) was an English courtier. He was the son of Thomas Fiennes, 9th Baron Dacre (c. 1515–1541) and Mary Neville. He was baptized at Hurstmonceux, Sussex, on 25 June 1539 and he may have been named after Thomas Cromwell's son, Gregory. His father was convicted of the murder of a gamekeeper and hanged like a common criminal at Tyburn in 1541, and in the aftermath, the family was stripped of its lands and titles by Henry VIII. Gregory Fiennes is a sitter with his mother in a significant portrait by Hans Eworth. * * *