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Forms of the name occur with and without the prefix ni- or i-, as well as iki- (Swahili ki-) as the noun-class prefix for 'language', and variation of r ~ l ~ ly in the root. This results in many superficial variants, including Nilamba, Niramba, Nilyamba, Nyilamba, Ikinilamba, Ikiniramba, Ilamba, Iramba, Kinilamba, Kiniramba; there is also Nilambari.
The 50,000 Iambi speak a slightly divergent dialect, sometimes listed as a distinct language. On the other hand, the Isanzu language is sometimes included as a dialect.