Rainen is a very rare boys' name that peaked in 2009 and has since faded.
Rainen is a boy name. In 2025 it ranked #13,433 for boy births in the United States (and #27,647 across all names), given to 5 babies. Rainen was first reported in SSA data in 2008 and peaked in 2009 (18 births).
Boys named Rainen per year · hover for count and boys rank · Source: U.S. Social Security Administration, national data 2008–2025 · U.S.+territories from SSA territory files (1998–2025) · SSA publishes a name only in years it was given to at least 5 babies, so a name may have been in use before — or between — the years shown here