Everyone on the Island calls him proffesor, but what is his characters name?

The Professor's name was Dr.Roy Hinkley, and the actor who played the role was Russell Johnson. For information on both Russell Johnson and the Professor, go to:
www.russell-johnson.com (http://www.russell-johnson.com)

I've got a question: many sources have called him Roy Hinkley, Jr. But I haven't found one reference to the "Jr." in the show. Anyone know? Also about Mrs. Howell's first name being "Eunice." Can't find it.