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“Variant of Gaius — rejoicing (from Proto-Indo-European *geh₂w- 'to rejoice')” — Latin origin
Boy's name · #1029 in the US (2025) · Trending
The whole story of Kaius fits in one generation — unrecorded before 2005, about 2,000 boys since, and a 2025 rank of #1029 (220 newborns last year). Together with its spelling variant Caius (#927), Kaius would rank around #605 with about 470 births last year — the newborns split about 54/46 between Caius and Kaius.
Around the world: about 1 in 6,300 boys in Canada (2024) · about 1 in 11,000 boys in England & Wales (2025).
Appears in 2020-2025 birth records of 22 states. See the full state-by-state map on this page.
Similar names: Caius · Ames · Kaycen · Aurelius · Tidus · Lux
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