This list combines 2,309 spelling variations into 1,002 grouped names based on shared pronunciations. The most popular name in 1966 is Michael, given to 82,945 babies in total. Learn more about how this works.

Darrell has the most spelling variations with 25 different spellings, while Jerrell has the highest confusion index at 80.5%, indicating the greatest diversity in how parents choose to spell it.

When combining spelling variations, Quentin showed the biggest improvement, moving up 190 positions from 494 to 304, while Vincent had the largest drop, falling 11 positions from 57 to 68.

Looking at trends, Heath shows the strongest upward momentum (births in 1964–1966 are 1966.67% higher compared to 1957–1966), while Unknown shows the steepest decline (85.69% lower). Compared to 1965, Heath had the largest rank improvement, moving up 257 positions to rank #310, while Lyndon fell 61 positions to rank #422.