Old High German riohhan

← Old English reocan (cognate)

← Proto-West Germanic *reukan (inherited)

← Old Norse rjúka (cognate)

← Old Frisian riaka (cognate)

→ Old English reocan (cognate)

→ German riechen (inherited)

→ Central Franconian ruche (mention)

→ Alemannic German rauche (mention)

→ Luxembourgish richen (inherited)