Arlo
[ˈɑːrloʊ]Meaning
meaning uncertain; perhaps from the Irish place name Aherlow, "between two highlands"
Background Story
Arlo is a unisex given name first used by Edmund Spenser, who evidently invented it for the hill where the gods debate in The Faerie Queene (1590 and 1596). Its meaning is uncertain; it was perhaps inspired by that fictional place name, which Spenser probably formed by altering the real Irish place name Aherlow, meaning "between two highlands". Although originally a male name, a 2018 Yahoo! UK article indicated it was growing more popular for girls in England and Wales.

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