Enya and Eyna are both four-letter answers to the crossword clue 'Orinoco Flow Singer'. Enya is an Irish singer, songwriter, musician, and producer who rose to fame in the late 1980s with her debut album, Watermark. She has since released eight studio albums and won four Grammy Awards. Eyna is a stage name of the Spanish singer and songwriter, Irene Gómez, who is best known for her single 'Orinoco Flow' which was released in 1998.