Because, for one thing, "Max" is common enough in our family -- it's supposed to be in honour of my paternal grandfather, but I also have an uncle Max on Dad's side -- that having it as a second name would be enough. Just like the tyke's cousin Jonathan, my sister Tinka's son, has (IIRC). Also, I wanted to name him for my best friend ever since we were kids, his godfather Leif; now, that looks a little too much like an afterthought for my taste...
Also, IMO, the original order just "scans" better, in speech as well as writing.
Oh well...
No, I hadn't (at least not deliberately) given any hints about my birthday; I just wanted to test your supernatural powers -- HTF *do* you know almost everybody's birthdays like that?!? :-)
FWIW, yes, you're exactly right: I'll hit "the big four-oh"(*) month after next.
And here's one FYI (or TMI :-) : Anki's birthday is on the same day of the month as mine, but a month later. She's exactly thirteen months younger than I.
(*): Decimal.