In 2025, 35 US boys were named Neizan, making it the 3,358th most common boys’ name of the year, down 1,377 places from #1,981 in 2024. That is 44 fewer than the 79 boys named Neizan in 2024. Its best rank for boys was #1,781, reached in 2023. That year also had the most boys given the name: 91. For comparison, it was #6,966 in 2015 and unranked in 1950.
Social Security card records list Neizan in 14 years of the 146 from 1880 to 2025, starting in 2011 with 5 babies. In all, 486 US babies have been given the name, all of them boys. Its busiest decade was the 2020s, with 389 babies named Neizan.
Over the 10 years from 2016 to 2025, 451 US boys were named Neizan; the busiest of those years was 2023, with 91. In 2025 that was about 1 in 48,802 of the boys in SSA’s list for the year.