Alley, of French origin, is a unisex given name derived from the French word 'aile', meaning 'wing'. It was traditionally used as a surname for someone who lived near an alley or lane. However, in recent years, it has gained popularity as a first name, likely influenced by its use in popular culture, such as the character Alley Oop from the comic strip of the same name.
"Alley was not a particularly popular name during the period from 1914 to 1930, with only 42 babies being named Alley within those years."