Mammal names among two Bantu-speaking peoples were investigated. The Songola (linguistic zone D) have 66 names whereas the Ombo (zone C) have 49, of which 32 have the same etymology. On the other hand, Songola (D-24) and Mbuti-Bira (D-32) have only 5 mammal names in common, and Ombo (C-69) and Boyela (C-74) have only 10. The large similarity between Songola and Ombo may be understood as a result of borrowing that occurred when the Ombo migrated into the Songola territory.