In 2025, 8 US boys were named Dyan, making it the 9,137th most common boys’ name of the year, up 1,043 places from #10,180 in 2024. That is 1 more than the 7 boys named Dyan in 2024. Its best rank for boys was #6,293, reached in 1992. The most boys given the name in a single year was 10, in 2023. For comparison, it was #12,582 in 2015 and unranked in 1950.
Fewer than five US girls were named Dyan in 2025, so it does not appear in that year’s SSA list for girls. Its best rank for girls was #980, reached in 1970. That year also had the most girls given the name: 128. For comparison, it was unranked (under five girls) in 2015 and #2,367 in 1950.
Social Security card records list Dyan in 77 years of the 146 from 1880 to 2025, starting in 1939 with 5 babies. In all, 1,928 US babies have been given the name, 94% of them girls and 6.4% boys. Its busiest decade was the 1970s, with 656 babies named Dyan.
Over the 10 years from 2016 to 2025, 58 US boys were named Dyan; the busiest of those years was 2023, with 10. In 2025 that was about 1 in 213,510 of the boys in SSA’s list for the year.
Related spellings in the SSA files include Dian (5,578 babies since 1880), Dyani (1,337 babies since 1880), Diane (520,034 babies since 1880) and Dean (195,844 babies since 1880).