In all seriousness, be very careful. I don't know your last name, but if I recall correctly it's heavy on the syllables. Don't match more than two syllables of first name with three+ of last name, I would imagine. Similarly, think of nicknames -- Augie/Gus and I'm not sure what for Atticus. Make sure you like those as well. Contrast it with your daughter's name, maybe. There are so many pitfalls to naming kids, I don't relish the challenge if it ever crops up in my life. I met a guy named Chisholm at work yesterday -- that's naming your kid something unique and doing it right. Seriously great name. If the kid doesn't own it it doesn't mean shit though. I really feel like more people should explore with names like that, but at the same time remember that this is one of the most important parenting decisions you can make. You can really screw up a kid's childhood with a bad name, or an overcomplicated name (or by naming your daughter after a character in a popular TV show who seems like she's doing okay but takes a sharp turn for the worse in the ensuing books that you haven't read), or a name no one can pronounce right off the bat, etc. A close friend of mine in high school had a cat named Atticus that turned out all right. Its sibling Ticonderoga didn't end up so well, though. I don't know. Nominal determination?
Chisholm sounds like his mother's maiden name possibly. Excellent way to honour the maternal line if the last name is the father's. Unusual first names can be hell on a kid early in life, but several adults have told me that they now like their unusual name because people tend to remember them and, as an adult, it can be beneficial to stand out from the crowd.
I was doing some research! There's this and this. I'm leaning to the latter because I'm in Oklahoma.