Hispanic names ending in -th

Factual Questions
1

Recently, I’ve noticed a few names of women from Hispanic countries of the form Y…th: Yenith, Yulieth, Yenileth, etc. I get that the initial ⟨y⟩ is pronounced similarly to the soft G in English (/dʒ/ or /ʝ/ or maybe /ʝʝ/). But what about the ⟨th⟩? I could only find one woman with one of those names on YouTube pronouncing her name; to my untrained ears, it sounded like a normal /t/ to me. For what it’s worth, she was Colombian. (The only remotely famous person I can think of with one of those names is Panamanian goalkeeper Yenith Bailey, but I couldn’t find a pronunciation guide for her name.)

  1. Is it just a normal /t/?
  2. Would the names sound differently if they were spelled with just ⟨t⟩ instead of ⟨th⟩?

Thanks!

2

Some of those names are from English: Yulieth is supposed to be Juliet, for example (in Spanish it’s Julieta and the J is a /x/). Some are invented. That final “th” isn’t part of Spanish spelling rules, it’s a piece of “trying to be fancy”: there isn’t an official pronunciation for it (…yet; with or without variation by dialect). Fancy word: its pronunciation is idiolectal (it varies depending on the individual).