Trino is of Italian origin, derived from the Latin 'Trinus', meaning 'third'. It is often used as a short form for names like Antonio, shortened to 'Tony' in English. Trino was once quite popular, but its usage has since declined and it's now considered somewhat rare.
"Trino experienced peak popularity between 1953 and 1962, with an average of 7 births per year during this period. However, it has since become quite uncommon, with fewer than 9 births recorded in any year since 1984."