Ian is Scottish form of John, derived from the Hebrew name Yohanan. It is an Anglicization of the Scottish Gaelic Iain, which is also a viable spelling. Ian was introduced to Americans by Ian Fleming, creator of James Bond.

Harry is the medieval English form of Henry, which derived from the Germanic name Heimrich, meaning "estate ruler." Harry was the nickname of all eight King Henrys; it is also a diminutive of Harold and Harrison.

Justin has been widely popular since the 1980s, when parents were seeking a fresher 'J' boys’ name to replace Jason, Jeremy and Jonathan. It's been dipping in popularity a bit in recent years but it reached as high as Number 9 in 1990. At this point it's Justin that is suffering from overexposure.

Both a saint's name and a presidential one via Gerald Ford—who was born Leslie—Gerald is a quintessential 1930s-40s name, when it ranked as high as Number 19. Hence all those nice middle-aged and senior Jerrys we've known and loved. Gerald has always been popular in Ireland, accounting for the prevalence of Fitzgeralds there. Though not considered stylish, Gerald remains on the popularity charts. Cousin Gerard has a similar profile, Geraldo is the well-used Spanish version, and Geraldine is the most promising of the family, in line to follow the path of Josephine to imminent revival.