Pay no attention to the nephalem among you. They are just faster typists and excellent piano players.
There is some Six Finger Dwarfism among the Amish, caused by in-breeding. Occasionally first cousins will marry and that defect is sometimes the result. I only ever saw one, myself. He was not a dwarf, but about five-foot-three or four. He had an extra finger on each hand, and probably extra toes, as well. I’ve known Amish dwarfs who were four feet tall, but who had normal hands (and feet?). All from marrying too close relatives.
It is interesting to see the supposed benefits of this being touted. My first thought was Goliath of Gath, assumed by some to have been one of the last surviving Nephilim.