How do you pronounce Sol?

So I'm listening to the audiobooks for the first time but I grew up reading the books. I'm on Eclipse where they first meet Sol, and McLeod Andrews pronounces his name like "Sawl", meanwhile for the past decade or so I thought it was pronounced like "Sowl", like how you say the first part of solar. Have I been saying it wrong? Or is there not really a right answer and it can be said both ways? Would love y'all's opinions on this bc I'm kinda feeling like my life is a lie lol