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What does Gaius mean?

Gaius Pronunciation of Gaius [gaius] as a boys' name is pronounced GIE-us. It is of Latin origin, and the meaning of Gaius is "happy". Probably the root of the word "gay", which used to mean "jolly". Also a biblical name, and the name of a Roman jurist in the second century. Caius is a variant that occurs in England.

Associated with: happy, biblical, roman, england.


Gaius has 7 variants: Cai, Caio, Kay, Kaye, Keye, Keyes and Keys.

Related boy name: Jay.

2 feminine forms: Jacey and Jay.

Creative forms:
(male) Gaiius, Garius, ..

(female) Gaiusi, ..

Middle name pairings:
Gaius Cormac (G.C.), ..

How popular is Gaius?

Gaius is an uncommon given name for men. Gaius is also a unique last name for all people. (2000 U.S. Demographics)

Which version is better?

with its variant forms and related boy names. Jay (#394 in 2015), Caius (#1283), Cai (#1819), Kaye and Kay are the popular varying forms of Gaius (outside Top 2000) appearing in the Top 2000. These relations of Gaius were favored as baby names during the years 1960-1969 (usage of 0.2%) and are now significantly less widespread (usage 0.1%, down 76%), with versions such as Kay becoming somewhat dated. (2015 U.S. SSA Records)

Top 2000 baby names ranking of Cai, Caius, Jay, Kay, Kaye in U.S.

Top 100 baby names ranking of Jay outside U.S.

Similar Names

Gaius is pronounced similarly to Gaz, Gus, Guss and Guus. Other recommended names are Arius, Dacius, Darius, Fabius, Gaige, Gail, Gaile, Gaill, Gaine, Gaines, Gains, Gair, Gamul (see Gamal), Jairus, Janus, Jarius, Magus, Manus, Marius and Pius. These names tend to be more frequently used than Gaius.

See names
in meaning and etymology.