Caius

Meaning: Rejoicing
Origin: Latin — Variant of the Roman name 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.

#395 in N. Ireland (2025) · #916 in Canada (2025) · #976 in England & Wales (2025) · #2,144 in Sweden (2025) · #2,151 in Austria (2025) · #2,091 in Ecuador (2024) · #395 in New Zealand (2020) · #711 in Scotland (2020) · #689 in France (1925).

Famous Caiuses

Caius — Head of the Catholic Church from 283 to 296 (died 296)
Caius Faatili — New Zealand rugby league footballer (born 2001)
Caius Gabriel Cibber — Danish sculptor (1630–1700)
Caius of Korea — Korean Catholic martyr (1571–1624)
Caius Welcker — Dutch footballer (1885–1939)

In stories & tradition

Caius Prenlomnibus — Asterix character

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 statesman and consul (5th century BCE).

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 · Beaux · Kaisen · Aurelius · Calum · Kaiser

Browse more boy names — popularity, trends and eras for 5,700+ American names, free.

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