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Cai

“Variant of Caius — Latin, from a root meaning "to rejoice"” — Welsh, from Latin Caius/Gaius origin

Boy's name · #2108 in the US (2025) · 2020s

Cai has appeared in US records since 1989 — best rank #1611 (2022) · 1,450 babies named Cai all-time · 1 in 25,000 boys born in 2025.

Around the world: about 1 in 5,200 boys in England & Wales (2025) · about 1 in 6,500 boys in Scotland (2025).

Appears in 2020-2025 birth records of 6 states. See the full state-by-state map on this page.

Famous Cais

• Cai Shu — High Jumper
• Cai Hegermann-Lindencrone — Danish general and politician (1807-1893)
• Cai A. Vagn-Hansen — Danish jurist
• Cai Shangyan — Chinese athletics competitor
• Cai Jinbiao — footballer

In stories & tradition

• Cai Shen — deity
• Cai Zhong — The Romance of the Three Kingdoms
• Cai He — The Romance of the Three Kingdoms

What Cais become

Among 448 notable people named Cai:

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

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