River shares the tranquil feeling of all the water names, and seems to have pretty much escaped its past strong association with River Phoenix and his unfortunate fate. Actor Joaquin Phoenix named his son with actress Rooney Mara after his brother River.

Short, sharp, and cool, Jett is a contemporary choice that connotes both gemstones and jet engines. Rarely used before the 90s, John Travolta, and then George Lucas, helped to put the name on the map by choosing it for their sons.

Rugged and outdoorsy, Heath was an obscure choice until the 1960s when it was used in the television series, The Big Valley for character Heath Barkley. It peaked in the 70s when it reached the US Top 200, but it has since fallen to the latter end of the Top 1000.

Emerson is a dignified, somewhat serious name associated with transcendental thinker Ralph Waldo Emerson. Much more popular now for girls since Desperate Housewife Teri Hatcher used it for her daughter, it is definitely still a viable boys name.

Knox is an old Scottish surname that Brad Pitt (whose great-great-grandfather was named Hal Knox Hillhouse) and Angelina Jolie took out of the back cupboard, dusted off, and elevated to coolness--to the point where it entered the popular baby names list in 2009. Knox now ranks among the most influential celebrity baby names.

Paxton stands out from a lot of other two-syllable surname names for two reasons: the dynamic letter X in the middle, and its admirable peace association, providing the great nickname Pax.