Old Norse hjarni

← Proto-Germanic *hernô (inherited)

← Proto-Germanic *hirzniją (mention)

← Proto-Indo-European *ḱerh₂s- (derived)

→ Danish hjerne (inherited)

→ Ancient Greek κάρυον (cognate)

→ Icelandic hjarni (derived)

→ Norwegian Bokmål hjerne (inherited)

→ Norwegian Nynorsk hjerne (inherited)

→ Swedish hjärna (derived)