Meaning and history
Cai has several independent origins. In Welsh it is a form of Caius or Kay, the name of one of King Arthur’s knights, while in Chinese it can represent different names depending on the character and tone, including Cái, meaning “wealth.” Notable bearers include Welsh actor Cai Brigden and Chinese-American computer scientist Cai Lun’s historically romanized name.
20062006: 23 births, rank #4,105
2007: 29 births, rank #3,591
2008: 39 births, rank #3,005
2009: 41 births, rank #2,894
2010: 38 births, rank #3,014
20112011: 39 births, rank #2,950
2012: 54 births, rank #2,358
2013: 55 births, rank #2,299
2014: 71 births, rank #2,000
2015: 82 births, rank #1,815
20162016: 82 births, rank #1,828
2017: 68 births, rank #2,049
2018: 65 births, rank #2,147
2019: 66 births, rank #2,150
2020: 66 births, rank #2,113
20212021: 87 births, rank #1,799
2022: 108 births, rank #1,611
2023: 86 births, rank #1,851
2024: 83 births, rank #1,902
20252025: 69 births, rank #2,108
In 2025, 69 babies were recorded with the name Cai, ranking #2,108 among boys.