Proto-Germanic *dunkalaz

→ Afrikaans donker (inherited)

→ German dunkel (inherited)

→ Middle Low German dunker (mention)

→ Old High German tunkal (mention)

→ Indonesian dongker (derived)

→ Luxembourgish donkel (inherited)

→ Dutch donker (inherited)

→ Old Norse døkkr (mention)

→ Yiddish טונקל (inherited)