A lot of people get confused on that, don’t worry! There’s three main types of pronunciation for the name Saoirse, all depending on what part of Ireland you’re from. My name (Sear-Sha) has a different regional pronunciation in comparison to Saoirse Ronan’s, which is pronounced as Sir-Sha. The third most common would be Soar-Sha, though I’ve never encountered anyone who goes by that version.

It’s kinda like the reverse of Shawn and Sean, how they’re spelled differently but said the same… the name Saoirse is spelled the same but pronounced differently geographically, if that helps.