Caius is a boy name with a rare feel, drawn from real birth records. Below you'll find how many babies have been named Caius across the United States, UK, Ireland and New Zealand, how popular Caius has been over the decades, and the year it peaked.
| Country | Births on record |
|---|---|
| United States since 1880 | 2,329 births |
| England & Wales since 1996 | 481 births |
| Scotland since 1974 | 9 births |
Counts come from official national birth-registration statistics: U.S. Social Security Administration, England & Wales (Office for National Statistics), Scotland (National Records of Scotland), Northern Ireland (NISRA), Ireland (Central Statistics Office) and New Zealand (Dept. of Internal Affairs). Coverage spans differ, so totals aren't directly comparable across countries.
Babies named Caius per year, United States (1994 to 2025). United States peaked in 2025 (254/yr) · England & Wales peaked in 2023 (35/yr) · Scotland peaked in 2011 (6/yr).
Caius is an uncommon baby name in the United States. It was most common in 2025, when it ranked #1,901 nationally (given to 285 babies that year).
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