Proto-West Germanic *þū

→ English thou (inherited)

→ Old English þu (inherited)

→ Cimbrian du (inherited)

→ German du (inherited)

→ Middle Dutch du (inherited)

→ Middle English þou (inherited)

→ West Frisian do (inherited)

→ Old High German du (inherited)

→ Limburgish doe (inherited)

→ Mòcheno du (inherited)

→ Dutch du (inherited)

→ Old Dutch thu (inherited)

→ Old Frisian thu (inherited)

→ Old Saxon thu (inherited)

→ Saterland Frisian du (inherited)

→ Yiddish דו (inherited)