Old English frosc

← German Frosch (cognate)

← West Frisian froask (cognate)

← Proto-Germanic *fruskaz (inherited)

← Old High German frosc (cognate)

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

← Low German Fuorsk (cognate)

← Dutch vors (cognate)

← Norwegian frosk (cognate)

← Old Norse froskr (cognate)

← Old Dutch forsk (cognate)

← Old Frisian *frosk (cognate)

← Old Saxon *frosk (cognate)

→ English frush (cognate)

→ Old Norse froskr (cognate)