To add to what's been said earlier, Tamil word maamaa is from older form - ammaaman - mother's brother; amma being mother. ammaaman > maaman > maamaa. also, ammaan. ammaami > maami, is the female form.
Thanks @gagun. All south indian languages belong to dravidian family of languages. I often refer to UChicago And Starling dravidian dictionaries.
Uchicago has Sanskrit dictionaries as well, and possibly for all languages.
Starling actually has etymological dictionaries for many languages. It's very good to learn about root words, though I wish they kept all Dravidian together, instead of spliiting it as northern and southern Dravidian. I see lot more similarities between Tamil and Telugu or Telugu and Kannada to put them in separate groups. Nonetheless, it's a great database for students of any language.
Thank you for your reply and I want to give some info about pronunciation of some root words in which letters like ka and ga in Telugu are different letters but most of the times(DIFFERENT SLANGS) could be interchanged like pa or ba etc and pa in Telugu becomes ha in Kannada.
Yes, same with Kannada and Tamil. PaLLi vs Halli. Though Tamil doesn't have separate letter for pa and ba or ka and ga like Telugu or Kannada does, we have the sounds that vary according to position. In thankam - Gold, it sounds like Ga. In kampam - pole, it sounds like ba. Hope to have more interesting conversation with you in this forum, about our languages.