She is mostly known as La Llorona, which is Spanish for the weeping woman. Depending on the source her story can vary, but she is commonly described as being a mother who either drowned her children, or they drowned in an accident and she perpetually searching for them, usually in the vicinity of bodies of water. She is to be feared because she will drag an unsuspecting child and drown them thinking it is one of her own.
Stranger Than Fiction Stories by M.P. Pellicer