Board Thread:General Sly Cooper/@comment-26349008-20170505123059/@comment-1845428-20170505183930

I think Sucker Punch was mistaken with "van," instead meaning "von," making Otto German, not Dutch.

And even if it is meant to be "van," his parents (and/or himself) could have been Dutch immigrants to Germany. Last names are much more "international" than first names. Someone with a German first name is very likely German, while someone with a Dutch last name is not necessarily Dutch (they may just have Dutch ancestry).