Father Duran says it is another name for Aztlan: "Estas cuevas son en Teoculacan, _que por otro nombre_ se llama Aztlan." _Historia de los Indios de Nueva Espana_, Lib.

i, cap.

i.] _Teo_ is from _teotl_, god, deity.

The description in the text of the relations of land and water in this mythical land, is also from Duran's work.
The lord of this land and the father of the seven sons is variously and indistinctly named.

One legend calls him the White Serpent of the Clouds, or the White Cloud Twin, _Iztac Mixcoatl_.[1] Whoever he was we can hardly mistake the mountain in which or upon which he dwelt.