Logan has become one of those "cool kid" names like Carter and Jackson. While historically Logan has been all over the place in terms of popularity, it has gained ground as a popular name once again and doesn't look to be going anywhere anytime soon. It's become a unisex name (although it's more popular for boys than girls) in addition to being a surname of Scottish origin. Bonus tidbit your son (and dad) will love: Logan is also the name of Wolverine from the X-Men comics and films.
Actor Logan Marshall-Green, Athlete Logan Mankins