Modern invented variant of Brynley, from Welsh 'bryn' (hill) with an English meadow-style suffix.
Brynlei is a modern American respelling of Brinley, which itself derives from an Old English place name: bryneléah, combining bryne (fire, burning) and léah (woodland clearing, meadow). The original meaning — a burnt clearing, likely referring to land cleared by fire for farming — is one of those wonderfully earthy Old English compound etymologies that describes a physical place so specifically you can almost smell the smoke. Place-derived surnames-turned-given-names have been a feature of English naming since at least the Tudor period, and Brinley follows that well-worn path.
The Brynlei spelling fuses the Old English root with visual cues borrowed from Welsh naming conventions: Bryn is a genuine Welsh word meaning "hill," and the -lei ending echoes Welsh feminine names. This layering is largely aesthetic rather than etymological, but it gives the name a Celtic mountain freshness that the original English form lacks. It sits comfortably in the family of names — Kinsley, Paisley, Hadley — that pair a strong consonant cluster with the melodic -ley/-leigh/-lei ending that has been one of the defining sounds in American girls' naming for two decades.
Brynlei reached mainstream American usage in the 2010s, driven partly by the broader trend toward nature-adjacent, place-flavored names and partly by the popularity of the Brinley spelling itself. The -ei variant signals individuality within a familiar phonetic template — a name that sounds immediately recognizable yet reads as distinctly the child's own.