Sir Thomas Knyvett (also Knevitt or Knivet or Knevet), of Buckenham, Norfolk (c. 1485 – 10 August 1512) was a young English nobleman who was a close associate of King Henry VIII shortly after that monarch came to the throne. According to Hall's Chronicle, Knyvett was a frequent participant in the jousts and pageants of the new king's glittering court and was made Henry's Master of the Horse in 1510.