Misc: Which county lies between the north sea and greater london?

Questions

in the tv series 'happy days' what was arthur fonzarelli's nickname?

in the tv series 'happy days' what was the fonz's full name?

in the tv series 'leave it to beaver' what was the mother's name?

in the tv series 'leave it to beaver' what was wally's best friend's name?

in the tv series 'seinfeld' who does michael richards play?