Ero is a very rare variant of Era that peaked in 2018 and remains in steady use.
Ero is a boy name. In 2025 it ranked #11,072 for boy births in the United States (and #22,851 across all names), given to 6 babies. Ero was first reported in SSA data in 1915 and peaked in 2018 (8 births).
Boys named Ero per year · hover for count and boys rank · Source: U.S. Social Security Administration, national data 1915–2025 · 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