Tali as an Arabic name meaning "the next" (as well as being a form of Tal). Still, the pronunciation is the same as the Hebrew Tali. I automatically assumed they were all the same, but they wouldn't have to be. And honestly, Tali could still be a nn for Natalie or Tallulah, and could still be pronounced the same as Tallie or Tally or Talie, if one wished.
I also like the name others have suggested. My favorites are Lorelei/Lorelai, Eleni, Noemi, Sarai, Heidi, and Jaci (spelled like that).A close friend goes by Lexi.
Keri (I know it's a bit dated but I love it)
Of course you could start you own tradition and decide to end all the girls name with others letters, but it's up to you.
I agree with previous posters -- use a legitimate 'i' name instead of mangling the spelling. Name traditions are nice, but they all end eventually. This one is particularly dated. Clearly your mother already made one exception. Why don't you use an 'ie' too, since it's now within the purview of the tradition?
If you still want to use an i-ending name, how about Adelei?
Eleni - my personal preference would be to choose names like this, that are normally spelt with a final I
If ie names are good because of Annie, then maybe something like
If all it needs is to end in that -ee sound then that frees up things like