Endowment may refer to many things:

Robert John (Rob) Guest, OBE (17 July 1950 – 2 October 2008) was a British born New Zealand-Australian actor and singer, best known for his work in Australian musical theatre, particularly in various productions of The Phantom of the Opera. He played the lead for a record 2,289 performances over seven years, more than any other performer including Michael Crawford, the performer most recognised in the role.

Rob Guest was born in Birmingham, England. The family moved to New Zealand when the young Guest was 13; they went to Canada for a time, but returned to Auckland, where he attended Mt Albert Grammar School and Avondale College.

Guest first went to Australia in 1970 with the band Cuttysark, which played at the Whisky Au Go-Go and Chequers in Sydney. However, the competition was too tough and he returned to New Zealand. He became a pop singer on the New Zealand radio charts, and starred for many years on a number of shows including Happen Inn. He also appeared in the Hamilton Operatic Society's productions of Half a Sixpence and Joseph and the Amazing Technicolor Dreamcoat. He won his first lead at age 22 in The Jesus Christ Revolution (which was presented as Man of Sorrows in New Zealand and which predated Jesus Christ Superstar). After performing his hit songs all around the world, Guest won the 1978 Korean Song Festival Best Male Vocalist trophy, recorded a special for the Canadian Broadcasting Corporation, and was voted the 1979 New Zealand 'Professional Performer of the Year'.