- Source: Thirlby (surname)
Thirlby is a surname. Notable people with the surname include:
Jess Thirlby (born 1979), English netball player and coach
Olivia Thirlby (born 1986), American screen actress
Rob Thirlby (born 1979), Cornish rugby union footballer
Thomas Thirlby (c. 1500–1570), English bishop
