According to historical tradition owes its
name to a primitive Inca voice Tangua who took a tribe whose leader
was called Tangua , who entered this region by Guamuez River ,
east of the Department of Nariño. This name has been preserved through
time and only for a few years the name was changed to San Rafael ,
but under the law prohibiting ancient geographical names vary, resumed his
original name.
Also, in the cultural tradition, is
believed to have originated from the words so much water ,
