Old Norse froskr

← Old English frosc (cognate)

← Proto-Germanic *fruskaz (inherited)

← Old High German frosc (cognate)

← Proto-Indo-European *prew- (derived)

→ English frosk (derived)

→ Old English frosc (cognate)

→ Middle English frossh (borrowed)

→ Faroese froskur (derived)

→ Icelandic froskur (derived)

→ Norwegian Bokmål frosk (derived)

→ Norwegian Nynorsk frosk (derived)