“Everyone grieves differently. You felt you honored your sister and gave her name a new and vibrant meaning – your mom sadly is reminded of something traumatic and painful and I understand why she feels that way.”
“I understand Alisa is her first name, but sometimes kids actually go by their middle names. Would it be an option to use her middle name as her daily given name? Just an idea, throwing it out there.”
“It’s a lovely gesture on your part in keeping your sister’s memory alive and with you but I don’t think I would have done the same without discussing it with my family and seeing how they felt before I did, especially if it’s going to trigger some awful memories and feelings.”
You can read the rest of the advice the internet had here.