Hi. I have five boys! They are Hunter John, Dylan Christopher, Evan Matthew, Brandon Michael and Owen Patrick. I see you have a one syllable name patter (well Zackary but nn is Zack), do you want to stay with the pattern? (I pictured myself yelling for all my guys when considering our last little guy's name, LOL)
One syllable name suggestions: Dean, Finn, Gage, Grant, Jake, Jett, Luke, Max, Quinn, Reese, Seth, Shane, Trent, Trey, Troy, Tate, Wes, Will
Our fourth was going to be named Shane Ryan (love this name) but I did not feel "it" when he was born, I don't know maybe it's my corny naming pattern, all my guys have two syllable names. But it flows nice with your guys' names. Hope you find "the" name and best of luck with your new little guy.