Echoes of the Multiverse

I'm not really sure where this actually belongs, as it pertains to both a comic book series (as well as to it's movies), but also to a fanfiction I am considering writing, but I kind of was wondering if someone could help me figure out what the genitive case for the name "Lorelei" as well as "Amora" would be. This is actually important for purposes of Norse Patronyms, or in this case, Matronyms.

Lorelei is German in origin, so it would not have a proper Norse declension, I suspect. For Norse words, http://bin.arnastofnun.is/leit/?q=Lorelei is suggested as a site to get declensions as referenced here.

The lorelei were female so in german die lorelei (The Lorelei) Sie ist eine Loerelei (she is a Lorelei).