Kalon Nadal

Their language is said to be the source of the name for Koronadal City, from two Blaan words – kalon meaning cogon grass and nadal or datal meaning plain, which aptly described the place for the natives. On the other hand, Marbel, which is another name for the poblacion, is a Blaan term malb-el which means "murky waters" referring to a river, now called Marbel River.