Vizard is a surname of Norman origin, derived from "Wisc(h)ard", from the old Norman/French personal name Guisc(h)ard.
Notable people with the surname include:
Brian Vizard (born 1959), American rugby union player Steve Vizard (born 1956), Australian media personality, businessman and philanthropist Ted Vizard (1889–1973), Welsh footballer and manager Walter Vizard (1861–1929), English cricketer Maude Vizard-Wholohan (1859–1950), Australian arts benefactor
Further reading http://www.surnamedb.com/Surname/Vizard
http://www.ancestry.co.uk/name-origin?surname=vizard