It’s not clear there was anything going on in Dubya’s life around October of 1982, when the name change went through. There doesn’t seem to be anything to “mourn” in relation to W about that time, either.
Presuming for a moment that Barry is the name change referent/beneficiary, we might wish to presume ‘Mounir’ was his name from birth, say 3/61. There doesn’t seem to have been anything particular going on in W’s (freshman in high school) life about that time, either, and seemingly nothing to mourn.
What significance would you care/try to attach to it?
“What significance would you care/try to attach to it?”
That the name is made up and no such person ever existed.