Reilly is an Irish surname and given name that means "valiant" or "brave." Reilly has historical roots as a surname and was first recorded in the Middle Ages, but it gained popularity as a first name primarily in the late 20th and early 21st centuries. Reilly has seen slight fluctuations in popularity, with a minor increase in male births in 2023, but it has not experienced a significant resurgence overall. It is often associated with qualities like strength and courage. Reilly is a versatile name that works well for both boys and girls, reflecting its rich history and cultural significance.
