About the name Sierra
Sierra belongs to the Spanish 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, Sierra first appears in Social Security records in 1940. It climbed to its best-ever rank of #49 in 1999, and in 2024 505 babies received the name — 100,111 in total since 1880. Those are the official counts, not estimates.