Criminal Minds

Tim is a boyish short form very rarely given on its own.

A second-tier classic, the New Testament Timothy moves in and out of fashion more than John and James. But though it peaked in the 1960s, many modern parents still appreciate its familiarity and lively rhythm. And the short form Tim feels eternally boyish.

Tobias is one of a number of s-ending boys' names that are riding a wave of popularity. With its Old Testament-Dickensian feel, it's a name with a distinguished pedigree.

William is one of the most enduring of classic names for boys. It's also among the most popular boys' names, as American parents see it as being ideally conservative yet contemporary, and hands-down the most popular baby name beginning with W of all time.