The name Westbrook is of English origin, derived from Old English place-name elements 'west' meaning 'western' and 'broc', which refers to a brook or stream. This suggests that the name originally denoted someone who lived near a western stream or brook. The surname Westbrook has been widely recorded in England since the 13th century, with early records including Robert de Westbrook in the Yorkshire Poll Tax of 1379 and John Westbrook, a vicar in Lincolnshire, who was listed in Kirby's Quest for Somerset in 1528. The name may also have been brought to America by settlers, as it appears in several states' early records. Today, Westbrook is more commonly used as a given name rather than a surname, often chosen for its unique and modern sound.
"The name Westbrook experienced fluctuations in its popularity with 5 births each in 2018 and 2022, while reaching a peak of 8 births in 2019, accumulating to a total of 18 babies named Westbrook during these years."