masc. proper name, originally a surname, from various places in England, literally "the broad clearing," from Old English elements brad (see broad (adj.)) + leah (see lea). Most popular in U.S. c. 1965-1995.
Old English brad "wide, not narrow," also "flat, open, extended," from Proto-Germanic *braidi- (source also of Old Frisian bred, Old Norse breiðr, Dutch breed, German breit, Gothic brouþs), which is of unknown origin. Not found outside Germanic languages. There is no clear distinction in sense from wide. Of day or daylight, late 14c.; of speech or accents, 1530s. Related: Broadly; broadness.
Old English leah "open field, meadow, piece of untilled grassy ground," earlier læch, preserved in place names, from Proto-Germanic *lauhaz (source also of Old High German loh "clearing," and probably also Flemish -loo, which forms the second element in Waterloo), from PIE *louko- "light place" (source also of Sanskrit lokah "open space, free space, world," Latin lucus "grove, sacred grove, wood," Lithuanian laukas "open field, land"), from root *leuk- "to shine, be bright." The dative form is the source of many of the English surnames Lee, Leigh.
<a href="https://www.etymonline.com/word/bradley">Etymology of bradley by etymonline</a>
Harper, D. (n.d.). Etymology of bradley. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/bradley