Caius

Meaning: Rejoicing
Origin: Variant of Gaius · from Proto-Indo-European *geh₂w- 'to rejoice' (from Latin (praenomen; archaic spelling of Gaius))

Boy's name · #927 in the US (2025) · Trending

Popularity over time

Caius is moving up the charts. First recorded in 1994, it stood at #927 in 2025 — its strongest showing yet; about 2,300 boys have been named Caius along the way.

Across the states

See where Caius is more common.

Appears in 2020-2025 birth records of 20 states. See the full state-by-state map on this page.

Around the world

See how Caius ranks in other countries and regions.

#410 in N. Ireland (2025) · #978 in England & Wales (2025) · #1,192 in Canada (2024).

Famous Caiuses

Caius — Pope of the Catholic Church from 283 to 296
Caius Welcker — Dutch footballer (1885–1939)
Caius Furius Pacilus Fusus — 5th-century BC Roman statesman and consul
Caius Gabriel Cibber — British artist (1630–1700)
Caius Iacob — Romanian politician and mathematician (1912–1992)

In stories & tradition

Caius Prenlomnibus — Asterix (comics)

What Caiuses become

Among 27 notable people named Caius:

Political leaders appear 2.16× more often than among typical names — e.g. Caius Furius Pacilus Fusus, Roman politician.

Spellings & nicknames

Together with its spelling variant Kaius (#1029), Caius would rank around #605 with about 470 births last year — the newborns split about 54/46 between Caius and Kaius.

Similar names: Kaius · Alessio · Kaisen · Aurelius · Beaux · Tidus

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