មេនំ (Khmer) comes from Thai แม่นม, from Thai นม, from Pali nāma, from Sanskrit नामन्, from Proto-Indo-Aryan Hnā́ma, from Proto-Indo-Iranian Hnā́ma, from Proto-Indo-European h₁nómn̥, from Proto-Indo-European h₃neh₃- — to name.
មេនំ (Khmer): wet nurse