Kimbundu, a Bantu language which has sometimes been called Mbundu A language name 'mbundu' was used by Guthrie in his 1948 classification, for his group R10 (the language is Umbundu, the Ovimbundu's language. Kimbundu is found as Ndongo-H21). This has become obsolete: In his 1971 classification, the group H20 is called the Kimbundu group, and the R10 group is called 'Umbundu group'. See: M. Guthrie, The Classification of the Bantu Languages (OUP, 1948), and M. Guthrie, Comparative Bantu, Vol 2 (Gregg Press, 1971).
