English virtue name meaning 'joyful' or 'fortunate,' used as a given name.
Happy belongs to a long tradition of English virtue and sentiment names — the same impulse that produced Joy, Grace, and Merry. Its roots lie simply in the Middle English word 'hap,' meaning luck or fortune, itself borrowed from Old Norse 'happ' (good luck). To be happy was originally to be fortunate rather than merely cheerful, and the name carries both senses: a child named Happy was being wished a life of good fortune as much as one of constant smiling.
As a given name, Happy enjoyed modest use in the American South and rural Midwest through the late 19th and early 20th centuries, where descriptive nickname-names were more freely bestowed. Its most famous modern bearer is Happy Rockefeller, née Margaretta Large Fitler Murphy, the second wife of Vice President Nelson Rockefeller, who acquired the nickname in childhood and wore it with unironic grace throughout her very public life. Happy Chandler — Albert Benjamin Chandler — served as governor of Kentucky and commissioner of Major League Baseball, most notably supporting Jackie Robinson's integration of the sport.
The name also belongs to one of Snow White's seven dwarfs, embedding it permanently in 20th-century Western childhood. Happy occupies an interesting space today: just unusual enough to raise an eyebrow, just cheerful enough to disarm it. In an era of surname names and invented syllables, a name that simply declares an emotional aspiration has a radical directness about it.