Farley is an English surname and given name of Anglo-Saxon origin, derived from the Old English word "fearn" meaning 'fern' combined with the suffix "-ley", indicating a clearing or wooded area. The name was likely borne by someone who lived near such an area. It gained popularity as a given name in the mid-20th century and has been associated with several notable figures throughout history, including American humorist Farley Mowat and English actor Colin Farrel.
"Farley seems to have been a popular name for girls in the early to mid-20th century, peaking around the late 1940s and early 1950s with over 30 births per year. However, its popularity has since declined significantly, with fewer than 10 births per year recorded from the 1970s onwards."