I'd be willing to bet that some of these "extra" daughters were the same girls using another part of their names. Just as Maria Esther and Margaretha Barbara had two names, the others probably did, too. You can be pretty certain that the Barbara christened in 1791 was ___ Barbara Clemmens. I don't think they'd have given two daughters the same name unless they had other names by which they could be distinguished. Perhaps Catharine was Sara Catharina.