Proto-Indo-European *oktōḱomt

→ Catalan vuitanta (inherited)

→ Greek ογδόντα (inherited)

→ Spanish ochenta (inherited)

→ French huitante (inherited)

→ Ancient Greek ὀγδοήκοντα (inherited)

→ Italian ottanta (inherited)

→ Portuguese oitenta (inherited)

→ Sardinian otanta (inherited)