i call my aunt ninny (idk where it came from) and my cousins call my mom nana (prounounced nah-nah) lol. my cousin mandy is taking care of her friends daughter and she calls her manna
ETA: i call my other aunt La.
In the Philippines we use the word "Tita" for Aunt. Just throwing in an idea.
I call all my aunts Tia, which is Spanish for aunt.
Yeah...find out what her heritage is and look up the word for "aunt" in that language. I always called my Polish grandparents by the Polish words for grandma and grandpa (babcia & dziadek...they sound NOTHING like they look, LOL)
I think tia is what I could use since my baby is spanish/polish.