Sister wants to name her baby a tragedeigh, against literally everyone's wishes and i might have accidentally started it

Okay so basically she has two daughters with regular t names. Tiyana and Taliyah, she wanted them to all have a t and a y, and shes still pregnant, (with a boy) so i was looking at names like Tyrone, and Tristian. she agreed she liked Tristian, BUT she wanted a y in there so she's set on Tristyn or tristiyn something like that. Mom hates the spelling, everyone's telling her not to but i thought i'd double check here to see if its really that bad.

EDIT: These comments are insane 😭 mom is showing my sister this post later, we'll she if she keeps the name

Edit 2: update has been posted