Ong Alan Pang Yean
Ong Dennis Dy
Ong Francis Beng Kiat
Ong Huay Liang
Ong Marcus Eng Hock
Ong Michael
Ong Tjhiang Bo
Ong Yang-Yi
Onge Joye Anne St.
Onishenko Donna Kathleen
Onitsuka Toshio
Onlock Stephen Graham
Onochie Chinedu Ifeanyi Peter
Onochie Lawrence Maduka
Onorato Linda
Onufrievich Irina Alexandrovna
Onuma Kazuya
Onuska Frank Patrick
Onwudiwe Herbert Odi
Onyett Agnes Heather