Namesakes
Chinese Emperors:
3 emperors
Emperor Liu Xin (a.k.a. Ai) 7-1 BC 
Emperor Sima Pi (a.k.a. Ai) 361-365
Emperor Li Zuo (a.k.a. Ai) 904-907
Olympic Medalists:
1 bronze, 1 gold, 1 silver
(gold) Ai Shibata 2004 swimming - 800 m freestyle
(bronze) Ai Ōtomo 2012 volleyball
(silver) Ai Fukuhara 2012 table tennis