About the name Diane
Diane belongs to the French and 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, Diane first appears in Social Security records in 1898. It climbed to its best-ever rank of #14 in 1955, and in 2024 83 babies received the name — 518,590 in total since 1880. Those are the official counts, not estimates.