About the name Sibyl
Sibyl belongs to the English & American 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, Sibyl first appears in Social Security records in 1880. It climbed to its best-ever rank of #376 in 1919, and in 2024 11 babies received the name — 4,441 in total since 1880. Those are the official counts, not estimates.