For Bappert there are 43 on Yasni with different names.
Among the most common last names on Yasni Bappert is on position 4636.
According to book I had as a former student of Germanistik (over 40 years) in the university library in your hands, Bappert comes from Badubrecht = Strong Bear. However, since the product at least my Bappert ancestors from the area of Boppard on the Rhine, I suppose, that our "family" takes its name from an indistinct (Old German?) Pronunciation of "Boppard" at least.
(Sent from: Christine Ehrlenspiel (geb. Bappert) )