I do think it's possible, and I do think it has been mentioned before, but I would lean a different way. I think because of the flashes Desmond did have a connection to Charlie, and Charlie's death saved Desmond's life and brought him and Penny back together. And because of that Desmond named his child after Charlie. (It's also possible they named their child after Charles Widmore but I think that's unlikely too.)
Then there's also the matter of Charlie's family. Charlie Hume was 3 on the boat with Penny and Des wasn't he? So there's the matter of getting Charlie Hume away from Penny, and to his other family his father (Simon?) and brother, Liam, and other mother. I think Charlie would have known he was adopted, and may or may not have recognized Desmond, at least somewhat. I don't know. I just don't see them going this direction. But maybe.
LOCKE: "Does any of this look familiar from when you were coming back?"
SAWYER “Well, yeah, there's my favorite leaf. How could I forget this place?"