one of the things I've noticed about the Amish people in Lancaster PA after countless trips is that they all look like they are related due to inter-breeding. They also look markedly different from everyone else.
I could grab random Amish people from one corner and bring them to another, and they would look like they could be members of the same family.
A lot of amish women are actually quite good looking.
Another commonality with the amish is that they are of somewhat above-average height and have long and thin limbs. All of them are thin as well, much more than ordinary people.