Rui is a unisex given name of Portuguese origin, derived from the word 'rui', which means 'royal' or 'red'. It gained popularity during the Middle Ages in Portugal and has since been used for both boys and girls. The name Rui is often associated with notable historical figures, such as Rui de Pina, a Portuguese chronicler who served King John I. Today, Rui remains a popular choice among parents in Portuguese-speaking countries and beyond.
"Rui has seen a significant increase in popularity since 2006, with a notable spike in recent years, from 7 births in 2020 to a peak of 12 in 2022."