Deverl is an uncommon, gender-neutral given name of American origin. It was likely derived from the combination of 'Devere', a place name in Ireland, and '-el', a common suffix found in many names.
"Deverl appears to have been a popular baby name around 1930, with five babies named Deverl each in 1912 and again in 1931, followed by another five in 1938."