Arlo, strongly associated with shaggy singer Arlo Guthrie, has an animated and cheery feel, thanks to its upbeat o ending. Some Arlo-lovers these days might be more inspired by "Justified" 's anti-hero Arlo Givens. Arlo was chosen by Toni Collette for her son, which might give it a further bounce in popularity, while Johnny Knoxville nudged Arlo into the unisex column when he used it for his daughter.
Arlo was not such a rarity in the first half of the twentieth century--it was Number 667 in 1915, for example.
Arlo is a name with several unexpected lives thanks to celebrity associations. It was first known as the name of folksinger Arlo Guthrie, son of Woody; then it was revived by television's "Justified" character Arlo Givens; and now it's been spun again as a girl's name by Johnny Knoxville, who chose it for his daughter. And since Arlo sounds so much like hot girl names Harlow and Marlowe, we say why not?