There is one place named Douka in Congo.
All places in the world called "Douka".
Mbaya (6)Mbomo (5)Lékana (4)Dzanga (4)Mbaka (4)Kongo (4)Yanga (4)Mboma (4)Nkoua (4)Yama (4)Masala (3)Mba (3)Koungou (3)Mpasa (3)Ngélé (3)Nkana (3)Okassa (3)Abala (3)Bamba (3)Kaye (3)Mobili (3)Nzabi (3)Poto-Poto (3)Yaya (3)Bango (3)Bonga (3)Inga (3)Paka (3)Ilanga (3)Kouka (3)