Proto-West Germanic *þak

→ English thack (inherited)

→ English thatch (inherited)

→ Old English þæc (inherited)

→ Cimbrian dach (inherited)

→ German Dach (inherited)

→ Middle Dutch dac (inherited)

→ North Frisian taag (inherited)

→ North Frisian tååge (inherited)

→ Hunsrik Dach (inherited)

→ Dutch dak (inherited)

→ Old Frisian thek (inherited)

→ Pennsylvania German Dach (inherited)

→ Plautdietsch Dak (inherited)

→ Saterland Frisian Täk (inherited)

→ Yiddish דאַך (inherited)