Brooke plays triple duty: It’s a surname turned first name, boys’ name turned girls’ name and thing/place name turned person name. It started out without that “e” at the end, and simply meant…brook. Like a little river. People who lived by brooks had the last name… Brook. It started to become popular as a girls’ name (with the “e” addition) in the ‘80s, right around the time Brooke Shields appeared in Blue Lagoon (1980). Even a few decades later, the name’s retained its part sophisticated, part quirky fashionableness.