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Arlo (pronounced /ˈɑːɹ.loʊ/) is a traditionally male given name. Some sources state it to be of Old English origin, meaning "endless energy";^[1] it was first used by Edmund Spenser, who "evidently invented" it, as the name of a hill where the gods debate in his poem The Faerie Queene (1590 and 1596).^[2]

A 2018 Yahoo! UK article indicated an increasing popularity of "Arlo" – alongside such names as "James", "Charlie", "Noah", and "Reggie" as a girls' name in England and Wales.^[3]

• Arlo Bates (1850–1918), American author, educator and newspaperman
• Arlo Gilliam (born 1977), American singer-songwriter and record producer
• Arlo Guthrie (born 1947), American folk singer
• Arlo Haskell, historian, poet, literary organizer, and publisher
• Arlo Hemphill (born 1971), American explorer, ocean conservationist and film actor
• Arlo U. Landolt (1935–2022), American astronomer
• Arlo Parks (born 2000), British musician
• Arlo West (born 1958), American singer/songwriter
• Arlo McKinley

• Arlo L. Olson (1918–1943), American military officer and recipient of the Medal of Honor

• Arlo Hullinger (1921–2021), American politician
• Arlo Looking Cloud (born 1954), Native American activist
• Arlo Schmidt (1931-2022), American politician
• Arlo Smith, District Attorney of San Francisco, California, during 1980–1996

• Arlo Brunsberg (born 1940), former professional baseball player
• Arlo Bugeja (born 1986), Australian speedway rider
• Arlo Chavez (born 1966), Filipino boxer who has competed at the 1992 Summer Olympics
• Arlo Eisenberg (born 1973), American aggressive inline skater
• Arlo White (born 1973), English sports commentator

• Arlo Beauregard, in the 2021 Netflix animated series I Heart Arlo, voiced by Michael J. Woodard
• Arlo Davenport, on the British soap opera Hollyoaks
• Arlo Dean, on the British soap opera Family Affairs
• Arlo Givens, on the television series Justified, portrayed by Raymond J. Barry
• Arlo Glass, on the 8th season of the television series 24

• Arlo Pear, in the 1988 comedy film Moving, portrayed by Richard Pryor
• Arlo, in the 2002 comedy film Orange County, played by Kyle Howard
• Arlo, a young green Apatosaurus and the main character in the 2015 Disney/Pixar animated film The Good Dinosaur
• Arlo Beauregard, the lead titular character in the 2021 Netflix film Arlo the Alligator Boy, voiced by Michael J. Woodard

• one of the titular characters of Arlo and Janis, an American comic strip

• Arlo Flores, one of the survivor characters in the Roblox game Daybreak
• Leader Arlo, one of the Leaders of Team GO Rocket in Pokémon GO