←
Proto-Germanic *farō (inherited)←
Proto-Indo-European *per- (root)→
Icelandic far (inherited)→
Icelandic för (inherited)→
Norwegian Nynorsk for (inherited)→
Norwegian Nynorsk fore (derived)→
Norwegian Nynorsk fòr (inherited)→
Old Norse ófǫr (prefix)→
Old Norse atfǫr (prefix)