köken: A nursery word. From Proto-Slavic *mama, from Proto-Indo-European *méh₂-méh₂, a reduplication of *meh₂- - the root of *méh₂tēr (“mother”). Cognate with German Muhme (“aunt”), Latin mamma (“mother, nurse”), Irish mam (“mother”), Lithuanian mama, moma (“mother”) among others. Cf. Proto-Slavic *tata, *baba.