Last name Onwanya (Onwanya 
) , around the world, is an extremely rare surname. The family name Onwanya is characteristic of Sub-Saharan Africa, particularly Nigeria, where it is an extremely rare surname. Much more prevalently, Onwanya is the forename as well as the last name.
Kamma, Kanjanawiwin, Choompolkul, Ngamsanga, Tiyanunti, Theanwithayanon, Prungchaiyaphum, Padungsak, Kaewyangdee, Veerawan, Tipsurart, Loweerapak, Klangpimai, Patamaphan, Kingkaew, Chuenglin, Sriharun, Sriwarom, Schutter, Songserm, Panisen, Khothep, Suarngkhawathin, Sapkhet, Sakphet, Sanngam, Mungmai, Kanjanwong, and Rattanamanee