Arianna might feel hard done by in later life; or, if she's sensible, relieved not to belong to the family -n ending cluster.
Let me just confirm:
Brian lives in
Bryan and names his son
Bryan. Oh. And then there's
Austin. I suppose Houston would have wrecked their A- theme. Are
Ashton and
Addison placenames or just generally trendy (
Ashton is a placename where I live)?
With an A theme, I'd have gone for
Adrian,
Alastair,
Alice and
Antonia. And I suppose they'd have had a lot of explaining to do, in a world full of Addisons etc.