You may have thought buckeyes referred to the candy's similarity to the round dark eyes of a male deer. Actually, buckeyes look very similar to and are named for the nut that comes from the buckeye tree. You may know it as a horse chestnut tree or if you live in Great Britain, a conker tree.   The buckeye tree is Ohio's state tree and Ohio State University fans will readily recognize the team name Buckeyes, as will their rivals. My husband thought we should rename these candies and I know those are probably fighting words!