Old English rætt

← Proto-Germanic *rattaz (inherited)

← Proto-West Germanic *ratt (inherited)

← Proto-West Germanic *rattā (mention)

← Old High German ratza (cognate)

← Old High German rato (cognate)

← Old High German ratta (mention)

← Old High German rato (mention)

← Old Dutch *ratta (cognate)

← Old Frisian *rat (cognate)

← Old Frisian *ratte (cognate)

← Old Saxon ratta (cognate)

→ Middle English rat (inherited(enm/en))