The meaning "hurtful" is accepted for the given name Dochartach, from which Doherty derives. Weisz probably means "white". In the case of Erik Weisz, aka Harry Houdini, it was doubtless a Hungarian spelling of the German name. Gautier is the French version of the male given name that is Walter in English. The first component looks like wood, i.e., woodland, but is said to mean something like rule or power.