Coastyn is a very rare boys' name that was first reported in SSA data in 2024 and is quickly gaining ground.
Coastyn is a boy name. In 2025 it ranked #10,934 for boy births in the United States (and #22,576 across all names), given to 6 babies. Coastyn was first reported in SSA data in 2024 and peaked in 2025 (6 births).
Boys named Coastyn per year · hover for count and boys rank · Source: U.S. Social Security Administration, national data 2024–2025 · 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