xolohua.

Elizabeth Hill Boone notes that "Seler regards Xolotl as the canine god who conducts the sun each evening to the underworld." She adds that Xolotl might be the sun as well as Venus, the evening star, and "an Aztec greenstone sculpture of Xolotl depicts him as wearing a sun disk on his back." She suspects that he is Venus "as the Evening Star but also Venus in the underworld."
Elizabeth Hill Boone, Painted Architecture (1985), 132.

James Maffie reminds us that Xolotl ensures the movement of the sun, and he is also the deity associated with "monsters, deforming diseases, and deformities."
James Maffie, Aztec Philosophy (2014), 206).

Xolohua, possessor of xolotl, may possibly be referring to the dog, xoloitzcuitli); or, Xolotl, an ancestor (the first Chichimec ruler); or, an animal/divine force, deity name (relating to Teotihuacan times); finally, it might have something to do with xolo, defined by Alonso de Molina as "paje, mozo, criado, o esclavo"
Manuel Orozco y Berra, Historia antigua y de la conquista de Mexico, v. 1, 451.

Xolohua 'quien tiene un xoloitzcuintli', la raza de perro común en México, o Texolohua, 'quien tiene un xoloitzcuintli de piedra'
Julio Alfonso Pérez Luna, Lenguas en el México novohispano y decimonónico (2011).