Advice: is there a cultural thing in India on who names the baby?

I am not Indian but my husband is. Before we even got pregnant my sister in law was adamant that it’s her right to name our baby. She even cried before we got pregnant when we said we’re not naming our baby on the name she likes because she only picked it because it rhymes with her kid’s name.

Now that we’re coming close to due date and have picked names ourselves, she’s still insisting on the name she likes and has made me feel really uncomfortable about the way she just outright dismisses the names we picked. She wants the names in her specific order, she wants the Indian name she likes and she says because we’ve picked an English name it’s her right to pick the Indian name. She also says she’ll call the baby the name she likes regardless of what we name it.

My husband says its culture and that I shouldn’t make a big deal out of it, but I haven’t seen anywhere (except for people from Maharastra or Gujarat - neither of which my husbands family is from) that says the aunt has the right to do this. Advice please before I lose my mind, it’s been bothering me for days and I’m definite it’ll come up again before the baby is born.