Alex has my surname and Colin has Michael's. You can just remember that the Nutts are the ones who have... yikes, I confess that didn't occur to me before we decided on a gendered naming strategy.

We just like the name Colin. His middle name is the same as Michael's father's middle name, though. Alex's middle name, Calvert, is a surname in Michael's birth mother's family. If we have another, we'll use a surname from my family as a middle name, like Nesbit or Kingsley.