Proto-Germanic *þrīz tigiwiz

→ English thirty (inherited)

→ Cimbrian draitzekh (inherited)

→ Cimbrian draiskh (inherited)

→ Danish tredive (inherited)

→ German dreißig (inherited)

→ Middle Dutch dertich (derived)

→ North Frisian dörtig (inherited)

→ West Frisian tritich (inherited)

→ Old Swedish þrætighi (derived)

→ Gothic 𐌸𐍂𐌴𐌹𐍃 𐍄𐌹𐌲𐌾𐌿𐍃 (inherited)

→ Dutch dertig (inherited)

→ Old Norse þrír tigir (inherited)

→ Old Norse þrjátigi (inherited)

→ Old Saxon thritig (inherited)

→ Swedish trettio (derived)

→ Yiddish דרײַסיק (inherited)

→ Zealandic dertig (inherited)