From a Spanish surname, used as a given name in honour of the Jesuit priest Saint Francis Borja (1510-1572). The surname, also spelled Borgia, is derived from the name of a Spanish town, ultimately from Arabic بُرْج (burj) meaning “tower”.
Means “lady of the water”, from Tupi y “water” and îara “lady, mistress”. In Brazilian folklore this is the name of a beautiful river nymph who would lure men into the water. She may have been based upon earlier Tupi legends.