It means barefoot, person who doesn't wear shoes. Who walks clean or clean paw. There is also the possibility that you ask for Ilopango (With initial capital, which looks like an l and with or instead of a ), if so it is a lake of volcanic origin and a volcano that exist in El Salvador. It is also the name of a municipality in the same area and the word that is of Nahuatl origin means Valley of the Elotes (maize plant). Therefore Ilopango also mean cornors.
