Old Saxon thriutein

← English þreotiene (mention)

← Proto-Germanic *þritehun (inherited)

← Old High German drīzehan (mention)

← Old Norse þrettán (mention)

← Old Frisian thretīne (cognate)

→ Old English þreotiene (cognate)

→ German dreizehn (cognate)

→ Old Norse þrettán (cognate)