Westrobothnian to

← Proto-Germanic *twai (inherited)

← Westrobothnian tjwo (link)

← Westrobothnian tjwå (link)

← Proto-Indo-European *dwóh₁ (inherited)

← Old Norse tvá (inherited)

← Old Norse tveir (mention)

← Old Norse tó (inherited)

→ Westrobothnian tutɑl (mention)

→ Westrobothnian tjwitɑla (compound)