Old Norse þann

← Old English þone (cognate)

← Proto-Germanic *þanǭ (inherited)

← Proto-Germanic *sa (mention)

← Old High German den (cognate)

← Gothic 𐌸𐌰𐌽𐌰 (cognate)

← Old Saxon thana (cognate)

→ Danish den (derived)

→ Danish denne (inherited)

→ Westrobothnian dänn (inherited)