[Facts] Origin of name
My great-grandfather was named Iselin in the 1830s. We are tying to learn the name's origin.
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According to Seibicke*, ISELIN is a short form (I would say: pet form) of names beginning with IS(EN) (such as Isger). This name element is itself shortened from "isarn," Germanic *isarna, Old High German "isarn," iron.
* Wilfried Seibicke: Deutsches Historisches Vornamenbuch, Berlin 1996-2006
* Wilfried Seibicke: Deutsches Historisches Vornamenbuch, Berlin 1996-2006