This name drives me nuts. Names that end in "son" drive me nuts in general, when they're used for little girls (I'm looking at you, writer of the movie "Splash", for starting this trend), but Addison is the worst, and I have no issue with laying the blame right on Shonda Rhimes's doorstep.
Shonda Rhimes created Grey's Anatomy. Up until Grey's Anatomy, Addison was a boy's name. Now, however, there are little feminine Addisons running around wherever you look, and every single one of them is Shonda's fault for naming a major female character a boy's name. (SON MEANS BOY.) Of all the trendy TV show names, this is by no means the worst- see Khaleesi for that particular honor- but it's still pretty damned grating.
The worst part of it is that, although the show is full of godawful names like Arizona and Ellis, there are some pretty good names as well that no one is using. Calliope. Meredith- which used to be a masculine toned last name, but after 100 years, we can finally ignore that since there's not a damned SON in the name. Adele. Richard. Good names. STRONG names.
But all we get is a plethora of tiny Addisons. Alas.