Brennley is a very rare variant of Brinley that peaked in 2017 and has since faded.
Brennley is a girl name. In 2025 it ranked #13,484 for girl births in the United States (and #22,447 across all names), given to 6 babies. Brennley was first reported in SSA data in 2010 and peaked in 2017 (56 births).
Girls named Brennley per year · hover for count and girls rank · Source: U.S. Social Security Administration, national data 2010–2025 · 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