In 2025, 881 US boys were named Onyx, making it the 365th most common boys’ name of the year, down 7 places from #358 in 2024. That is 50 fewer than the 931 boys named Onyx in 2024. Its best rank for boys was #307, reached in 2023. That year also had the most boys given the name: 1,079. For comparison, it was #1,426 in 2015 and unranked in 1950.
In 2025, 155 US girls were named Onyx, making it the 1,410th most common girls’ name of the year, down 162 places from #1,248 in 2024. That is 32 fewer than the 187 girls named Onyx in 2024. Its best rank for girls was #1,228, reached in 2023. That year also had the most girls given the name: 192. For comparison, it was #3,967 in 2015 and unranked in 1950.
Social Security card records list Onyx in 39 years of the 146 from 1880 to 2025, starting in 1918 with 5 babies. In all, 8,632 US babies have been given the name, 21% of them girls and 79% boys. Its busiest decade was the 2020s, with 6,039 babies named Onyx.
Over the 10 years from 2016 to 2025, 5,986 US boys were named Onyx; the busiest of those years was 2023, with 1,079. In 2025 that was about 1 in 1,939 of the boys in SSA’s list for the year.
Among the states, Onyx ranked highest in Nevada in 2025, at #198 for boys there. It was not in the top 100 of any state. Rarer spellings such as Onix, Onnix and Onnyx are summarised on this page.