Herman Kwan Hoi-San (Chinese: 關海山) (born Kwan Ming-kok; October 23, 1925 – September 11, 2006) was a Hong Kong actor. His English name was Herman Kwan. Kwan started off as a Cantonese opera actor in street theatre before joining New Voice Opera Troupe (新聲劇團). He also started singing for early Hong Kong film soundtracks and moved on to act in films, mostly adaption of opera in Cantonese. He became famous and acted in many lead roles. When Hong Kong films started to move towards Mandarin, Kwan's career faltered and joined TVB and acted in various roles. Directors and filmmakers rediscovered his talent and cast him in many supporting roles in films. In 2001, Kwan suffered a stroke and was left mute and paralysed. He died in 2006.