Old High German daz

← English that (link)

← Proto-Germanic *þat (inherited)

← Proto-Germanic *sa (mention)

→ Cimbrian dat (inherited)

→ German das (derived)

→ German dass (derived)

→ Alemannic German s (inherited)

→ Luxembourgish dat (mention)

→ Mòcheno s (inherited)

→ Old Norse þat (cognate)