My toddler has never uttered his name and refers to himself as “Owni”

My son is 23 months old and he has a large vocabulary, can repeat almost anything you say but has always refused to say his name which is “Lucas” and instead calls himself “Owni”. Is this just toddler behaviour or is he telling me his spiritual name and maybe I should nickname him that? Anyone have a similar experience?

Edit - There’s really nothing we call him that sounds like Owni. He looks at a picture of the family and will clearly say mama, dada, owni etc. Also, he can pronounce the L letter with lion and other words. I swear he is avoiding saying it because I’m certain he’s capable of pronouncing it, at least attempting to but he refuses. It’s not that it matters it’s just interesting.