Arlo, originating from Old English, signifies 'between two hills'. It is derived from the given name Aaron, meaning 'exalted' or 'high mountain'. The name gained popularity in the mid-20th century, partly due to its use in J.D. Salinger's novel "The Catcher in the Rye", where Arlo Vincent Vandeleur is a minor character. It has since been associated with various notable individuals, such as singer-songwriter Arlo Guthrie and actor Arlo White. Pronounced /ˈɑːl-oʊ/, it is often spelled simply 'Arlo', but variations like Arlie and Harlow also exist.
"Arlo experienced a significant rise in popularity from 2015 onwards, with a notable spike in usage starting in 2016."