Baby Name Judgment

So I am having a baby girl and me and my boyfriend have decided on the name “Thi’a” (pronounced “the-uh”) but we really like the spelling and we looked it up and it says you can spell it that way. We love it spelt that way. But my sisters and family are very judgmental and often talk behind my back saying the spelling is “ridiculous and stupid” every time i see my sister she asks me if I have thought about changing the spelling and I always respond with “no” and she follows my response by rolling her eyes. My question is, do you think that name is spelt in a ridiculous way? Is it that big of a deal? I mean me and her father love that spelling and we looked it up and it said it could be spelt that way. Please be honest.