Saint John the Baptist is the patron saint of Puerto Rico, and its capital city San Juan bears his name. In 1521, the island was given its formal name "San Juan Bautista de Puerto Rico", following the usual custom of christening the town with both its formal name and the name which Christopher Columbus had originally given the island, honoring John the Baptist. The indistinct use of "San Juan Bautista" and "Puerto Rico" for calling both the city and the island led to a reversal in practical use by most inhabitants due largely to a map-making error. Therefore by 1746 the name for the city (Puerto Rico) had become that of the entire island, while the name for the island (San Juan Bautista) had become the name for the city. The official motto for the island of Puerto Rico also references the saint, Joannes Est Nomen Eius (translated, "John is his name").