Catalan un

← Proto-Indo-European *óynos (inherited)

← Old Latin oinos (inherited)

← Proto-Italic *oinos (inherited)

← Latin ūnum (inherited)

← Latin ūnus (mention)

← Old Occitan un (inherited)

→ Catalan vint-i-un (mention)

→ Catalan trenta-un (mention)

→ Catalan quaranta-un (mention)

→ Catalan cinquanta-un (mention)

→ Catalan seixanta-un (mention)

→ Catalan vuitanta-un (mention)

→ Catalan noranta-un (mention)