Thirza is a female given name, a variant of Tirzah. Notable people with the name include:
Thirza Nash (1885–1962), South African novelist Lilian Thirza Charlotte Holt (1898–1983), British artist TJ Cuthand (born 1978, originally Thirza Cuthand), Canadian film-maker Thirza Petty, the wife of British author and minister John Petty (1807–1868)
Fictional people Thirza Tapper, a character in The Farmer's Wife
See also
Thurza Anetia thirza, a butterfly Tirza (disambiguation) Tirzah (disambiguation)