Romario is of Italian origin, meaning "moonlight." It gained popularity as a given name in the late 20th century, likely influenced by Brazilian footballer Ronaldo de Assis Moreira who was often referred to by his nickname Romário during his professional career. The name has since been used in various cultures around the world.
"Romario saw a peak in popularity between 1994 and 1996, with over 100 births per year. However, it has since become less common, with fewer than 50 births annually since 2003. The name's total births from 1989 to 2023 is 1080."