advice.. grandmother wants to be called "mama"

pye_d_pye

My mother in law wants her grandma name to be "mama (with an accent over the second a). " This is too close to mama for me. My sister in law just had a baby too and got shot down when she tried to suggest other grandma names, so she just gave up and doesn't care anymore. To me mama is the mom's name, not the grandma's. My mother in law likes the name because her mom died young and everyone called her grandmother mama. She thinks that anything else makes her sound too old. How would you handle this situation without trying to cause any hurt feelings. We've always had a good relationship, but this is crossing the line for me. Any suggestions of other grandma names that don't sound old. Already refused were: Grandma, Granny, Grammy, Abuela, Abue, Gran, and Nana.