Proto-Germanic *þai

→ English they (derived)

→ English tho (inherited)

→ Old English þa (inherited)

→ Faroese teir (derived)

→ Proto-Norse ᚦᛋᛁᛋᛉ (mention)

→ Old Norse þeir (inherited)

→ Elfdalian dier (inherited)

→ Swedish de (inherited(sv/da))

→ Swedish de (inherited)