My wife has an unusual surname and her family (about 10 of them with the name) were the only people they knew with it. According to the website it has a prevalence of 0! It simply offers alternatives.
10,157th for me. 52,853 other people bear my last name. That's a whole lot of potential family members i havent met. On the bright side, least I dont have to buy ****in Xmas presents for them. Most prevalent in USA, highest density in... Samoa. Hmm.
Mine is 10.762 most common & comes from Scotland by a man called Rule who saved the life of Robert the Bruce.