The name Cadman is a strong, intimidating name. It is usually given to boys, and the meaning of Cadman is 'warrior'. The name actually means warrior in Celtic, and Welsh as well. The name is uncommon, however. According to US records, the name was found less than five times out of a recorded six million people. A few famous people with the name Cadman as a surname are, Alan Cadman, an Australian Politician, and Charles Wakefield Cadman, an American composer.