Songs: The Search Is Over - _____?

Questions

in the monty python parody 'search for the holy grail' what was the name of the enchanter?

in the monty python parody 'search for the holy grail' what was used to kill the rabbit?

in the movie 'happy gilmore' who is happy's partner?

in the nursery rhyme, who ran away when the boys came out to play?

in the nursery rhyme, who were the three men in a tub?