There is one place named Olonga in Congo.
All places in the world called "Olonga".
Mbaya (6)Mbomo (5)Kongo (4)Yanga (4)Mboma (4)Nkoua (4)Yama (4)Lékana (4)Dzanga (4)Mbaka (4)Boko (3)Kindamba (3)Maboko (3)Malima (3)Ndongo (3)Bandza (3)Kouni (3)Mpe (3)Ngolé (3)Pangala (3)Boka (3)Kayes (3)Mbama (3)Mboulou (3)Okouma (3)Otala (3)Manda (3)Mpaka (3)Oka (3)Baya (3)