In modern Finnish, "mamma" is one of the words used colloquially to refer to one's grandmother (cf. "granny"). In some dialects, it can also mean simply "mother". These usages are probably loaned from Swedish where the formal words for mother and father are "mamma" and "pappa" respectively.

The Telugu word is the formal name (corresponding to mother on Wikipedia). Are you familiar with the language?

We'd need statistics on the frequency of the first consonant utterance, and see if it correllates with the distribution of the names given to mothers by babies.