About the name Cássio
Cássio belongs to the Portuguese tradition. Its roots are documented, even though its precise meaning is not recorded in the standard references — an honest gap we prefer to a confident guess.
In the United States, Cássio first appears in Social Security records in 2024. It climbed to its best-ever rank of #9101 in 2024, and in 2024 8 babies received the name — 8 in total since 1880. Those are the official counts, not estimates.