The story of Klein
Klein is rare for boys in the United States, ranked #5,506 in 2025 with 17 babies given the name. It is currently holding steady compared with a decade ago.
Since 1984, 370 American babies have been named Klein. Its peak came in 2013, when 25 newborns received the name, the signature sound of the 2010s.
The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Klein stood among all boys' names in any year, or use the compare tool to plot it against other names.