Another claims that the Spaniards named the place based on the report of a navigator named Acapulco, who saw the rolling hills frequently being lashed at by "daluyong" (“big waves from the sea”). This seems to confirm traditional pre-Hispanic stories that giant waves from the sea would meet the adjoining hills of the vast lowland, referred to as "salpukan ng alon". Felix dela Huerta, a Franciscan historian, observed that the rolling topography of this land resembled giant waves of the sea.