No everyone has their own, unique thumb print
The thumb is called a thumb instead of a finger because it is smaller than a finger. A thumb also has 2 joints and a finger has 3.
The word thumb comes, via Old English, from the Proto-Germanic word tûmon meaning "thick" or "stout". So a thumb was called "tumon" because it was the thickest, stoutest finger. This, over the...
no. no-one's thumb prints are the same
nope, if what i understand is right, then no they don't.