What my nearly 2 year old niece calls her family and why

previously in this series: nephew 1, nephew 2

her mom: mami

her dad: papi

her brothers: their names, Cistian and Mati. Like her brother immediately before her, my niece has trouble pronouncing her Rs. 

her maternal grandmother: Mom (in a Spanish accent). The reason for this has been explained in previous posts in this series. 

her maternal grandfather: Lito, sometimes 'ito, back when he was alive. 

her aunt (me): sometimes, if she remembers to do so, she will call me Tia. Usually she will call me Mom, in a sort of woman-related-to-me-who-is-not-Mami way, and most often of all will not call me anything. My first nephew loved/s me, my second nephew liked/s me, and my niece straight-up disliked me for the first year and a half of her life and now only tolerates me if she's in a good mood. How the mighty have fallen. 

I have not been around my niece when she's with her paternal grandparents, so I don't know what she calls them. Undoubtedly Abuelita [first name] and Abuelito [first name] are too difficult for her to pronounce at present. Verbally, she's behind her brothers (to be fair my first nephew is probably hyperverbal as he was very advanced for his age in terms of talking). She does speak in full sentences, but they are all babbling, and what she is saying is known only to her. Despite being exposed to more talking than her brothers, my niece is not very intelligible when she talks. My guess is that, as the third and youngest child, my niece has/has had even less face-to-face/conversation/language development time than her brothers, as my sister and brother-in-law are busier and busier with each child. My niece is even more stubborn than her brothers, and it's so fun to see them all interact.