How would you pronunciate the name "Jasiela"? - I'd say it jay-SEE-la or JAY-see-ELL-uh.
My stepdaughter is naming her baby this. - Oh, must she?
She is pronouncing it as "Gisella". - Then why not spell it Gisella or Gisela?
Do I need to make a comment to her about it? - Yes, but I don't think it will do any good...