Franklin Roosevelt

No president in American history has served as long as FDR, who served four terms. However, neither the length of his presidency nor his accomplishments during those 12 years can be blamed for the massive increase in babies named Franklin that began gracing America's maternity wards—the greatest spike in babies named Franklin occurred at the start of his presidency.

According to a Slate article based on US Census data, the number of babies named Franklin increased dramatically within the first two years of his election, with 5 times as many Franklins born on the day he was elected in 1932 as the previous week. Throughout his presidency, parents continued to name their children Franklin, though the name's popularity began to wane. However, as Slate points out, there was one day on the calendar that produced significantly more little Franklins than any other—January 30th, FDR's birthday.