They belong to the Daju, Hill Nubian, Kadu, Katla, Lafofa, Nyima, Rashad, Talodi–Heiban and Temein language groups. Five of these families (Daju, Hill Nubian, Kadu, Nyima and Temein) belong to the Nilo-Saharan language family, while four (Katla, Lafofa, Rashad and Talodi–Heiban) belong to the Niger–Congo language family. Kadu's relationship to Nilo-Saharan is uncertain; it was previously classified as Niger–Congo, and a conservative classification would consider it an independent family.[2]