I recently came across someone whose name is
Tatiana, but pronounced it closer to TaSiana and called 'Tasi'.
I'm not sure if this was how the name is pronounced where she is from (I believe she comes from South
Africa) or just how I heard it from their accent.
I quite liked the sound of it; however, I'm unsure if it's better as an unusual pronunciation (which would likely have to be corrected a lot) of
Tatiana or if it would be better to spell it Tasiana/Tassiana for easier saying, but it looks a bit made-up/creative.