About the name Willem
Willem 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, Willem first appears in Social Security records in 1916. It climbed to its best-ever rank of #1208 in 2003, and in 2024 50 babies received the name — 2,788 in total since 1880. Those are the official counts, not estimates.