Where does “trenta-un” come from?

trenta-un (Catalan) comes from Catalan trenta, from Old Catalan trenta, from Latin trīgintā, from Proto-Indo-European tridḱómt, from Proto-Indo-European tri-, from Proto-Indo-European tréyes — three.

trenta-un (Catalan): thirty-one

Definitions

thirty-one

Ancestry of “trenta-un”, step by step

trenta-un traces back through two separate lines of ancestry.

via Catalan trenta

Step	Language	Word	Meaning
1	Catalan	trenta	thirty
2	Old Catalan	trenta	—
3	Latin	trīgintā	thirty; 30
4	Proto-Indo-European	tridḱómt	thirty
5	Proto-Indo-European	tri-	three, threefold
6	Proto-Indo-European	tréyes	three

via Catalan un

Step	Language	Word	Meaning
1	Catalan	un	an; the indefinite article; some; one
2	Latin	ūnum	—

Words derived from “trenta-un”

trenta-unè

Every word from Proto-Indo-European tréyes →Every word from Proto-Indo-European tri- →Every word from Proto-Indo-European tridḱómt →