The name Arlo is a girl's name of Spanish origin meaning "between two hills".

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Arlo, an unexpectedly popular name for boys these days, is also finding new life as a girls' name. The first name Arlo may be rooted in the surname Arlow or the place name Aherlow, meaning "between two highlands". As a surname, it also has roots in a place name meaning "rocky hill".

 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. Now it's been spun again as a girl's name first by actor Johnny Knoxville and then by celebrity couple Leighton Meester and Adam Brody, who chose it for their daughters, no doubt inspired by soundalike girl names like Harlow and Marlowe.

 Arlo Parks (born Anaïs Oluwatoyin Estelle Marinho) is an up-and-coming British singer-songwriter, winner of the Brit Award for best new artist and the Mercury Prize for album of the year in 2021. 

 A growing number of girls are named Arlo in the US each year, with a handful more babies of both sexes receiving the Arlow and Arlowe spellings, which take this cool retro name more into sleek surname territory.

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The name Arlo peaked for girls at #1983 in 2023. The name is most popular in ARLO, ARLO, and ARLO. Arlo is also used for boys, ranking #146 in 2024.

The name Arlo is a boy's name of English, Irish origin meaning "between two hills".

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Quirky cool Arlo is now well and truly back. Last year it broke into the US Top 200 boy names and consistently ranks among the most popular boy names on Nameberry. 
 Arlo is even more popular in the UK, Australia and New Zealand. Arlo is also one of the top baby names among Nameberry's visitors from leading US cities.

 
Once strongly associated with shaggy singer Arlo Guthrie, Arlo has an animated and cheery feel, thanks to its upbeat o ending. It was chosen by Toni Colette for her son in 2011, which brought the name back into the spotlight. Previously, Arlo was in regular use in the first half of the twentieth century—it was Number 667 in 1915, for example, but it had dropped off the charts in 1944.
 Arlo has many possible derivations along with its Irish and English roots. It may be a shortened form of the Italian name Carlo or the Spanish Carlos, and in Basque-speaking regions it is the word for area. In English, Arlo was used as a place name, Arlo Hill, by Edmund Spenser in his epic poem The Faerie Queene and is thought to derive from the Celtic word Aherlow, meaning "between two highlands."

 A growing number of girls are also named Arlo in the US each year, with a handful more babies of both sexes receiving the Arlow and Arlowe spellings, which take this name more into smart surname territory.

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The name Arlo is currently ranked #146 in U.S. births. and peaked for boys at #146 in 2024. The name is most popular in ARLO, ARLO, and ARLO. Arlo is occasionally used for girls in 2024.

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