I feel like this whole thing from top to bottom is set up to judge this girl as trashy or valley-girl-esque or whatever, and it's honestly kind of weird and uncomfortable. I don't know this girl and I'm not going to judge her. The name is a typical case of both wanting to use a popular name and wanting to give a child a unique name and thinking a weird spelling somehow evens this out. But it's hardly egregious or anything. I'd have told her parents to pick either naming her Jessica or giving her a unique name and then named her Jessica or Jacinth accordingly.
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https://www.behindthename.com/pnl/120652