Family name Kaiyu (Kaiyu 
, 开玉 , 凯玉 ) , in the world, is quite a rare last name. The family name Kaiyu is characteristic of China, where it is a rare surname, Singapore, where it is a very rare surname, and Malaysia. More prevalently, Kaiyu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kaiyu | Japan, Taiwan, China, India, United States |
| 开玉, 开余, 凯玉 | China |
Каиыу, Каию, Кайю, 凯予, 凯余, 凯喻, 凯圉, 凯域, 凯妤, 凯宇, 凯峪, 凯嵛, 凯彧, 凯御, 凯愉, 凯愚, 凯昱, 凯榆, 凯毓, 凯渝, 凯煜, 凯燏, 凯瑜, 凯禹, 凯羽, 凯聿, 凯育, 凯裕, 凯誉, 凯语, 凯豫, 凯逾, 凯郁, 凯钰, 凯雨, 凯鱼, 凱喻, 凱宇, 凱煜, 凱裕, 剀峪, 垲钰, 开予, 开于, 开俣, 开喻, 开圉, 开域, 开妤, 开宇, 开屿, 开彧, 开愈, 开愉, 开愚, 开昱, 开榆, 开欲, 开毓, 开渔, 开渝, 开煜, 开瑀, 开瑜, 开禹, 开羽, 开育, 开虞, 开裕, 开誉, 开语, 开豫, 开逾, 开遇, 开郁, 开钰, 开雨, 开鱼, 恺予, 恺余, 恺俣, 恺妤, 恺宇, 恺彧, 恺愉, 恺昱, 恺毓, 恺煜, 恺玉, 恺瑜, 恺禹, 恺羽, 恺裕, 恺誉, 恺豫, 恺郁, 恺钰, 恺雨, 慨宇, 铠余, 铠宇, 铠御, 铠毓, 铠煜, 铠玉, 铠瑜, 铠羽, 铠语, 铠钰, 锎予, 锎宇, 锴宇, 锴渝, 锴煜, 锴玉, 锴瑜, 锴钰, 锴雨, 開玉, and 闿宇
| xiao kaiyu (b. 1960) |
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| ning kaiyu Chinese chess player, CN |
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