Characters in Celtic Mythology: 1 character
Cai (a.k.a. Kai)   (m)  
Nobel Prize Winners: 1 physics
(physics) Kai Siegbahn   1981  
Notable Actors and Entertainers: 1 actor
Xosha Roquemore (a.k.a. Kai)   1984-  
Notable Athletes: 1 skating
(skating) Kai Verbij   1994-  
Notable Scientists and Inventors: 1 physicist
Kai Siegbahn   1918-2007  
Olympic Medalists: 1 bronze/gold, 1 bronze/silver/gold, 1 silver
(silver) Kai Suikkanen   1988   ice hockey  
(bronze/silver/gold) Qin Kai   2008; 2012   diving - springboard; diving - synchronized springboard  
(bronze/gold) Zou Kai   2008; 2012   artistic gymnastics