From a Dutch surname that was derived from the given name Hendrik. A famous bearer of the surname was the American rock musician Jimi Hendrix (1942-1970).
The name of a half-Vulcan, half-human Starfleet officer on the Star Trek television series (1966-1969), later appearing in several movies. His name was invented by the writers, based on their rules that Vulcan names must start with an S and end with a k. In a 1985 tie-in novel his full name is said to be S’chn T’gai Spock (S’chn T’gai is the family name, since it is also borne by his father S’chn T’gai Sarek; this is despite the fact that he is often addressed as Mr. Spock by characters on the show).