About the name Seiya
Seiya belongs to the Japanese 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, Seiya first appears in Social Security records in 1996. It climbed to its best-ever rank of #7552 in 2005, and in 2024 9 babies received the name — 102 in total since 1880. Those are the official counts, not estimates.