Caxautn: This is the Old One assocated with predators. “He who stalks the deep jungles, whose passing causes the beasts to become suddenly silent and the winds to become still.”
Chotec: Chotec the sun god, is arguably the preeminent Old One in Lizardmen religion. The sun was viewed as the source of all life and power in many real-world ancient human cultures. Now picture its importance magnified in a people that need to warm up just to move. Chotec is usually associated with fiery colors, yellow, orange, red or combinations thereof. Magical items associated with Chotec involve fire, light, and/or sudden reserves of energy. Since Chotec is such an important Old One, his blessings are non-specific and likely to refer to good fortune. Those said to have his blessing are considered lucky and/or are natural leader though they can be prideful and aloof.
Huanchi: Huanchi the Jaguar God is the Old One of night. He is associated with stealth. He is usually associated with the color black, or at least darker shades of common colors. Despite his focus on stealth in fluff, magic items with his name attached in older books are more commonly associated with speed than darkness or trickery. Those with his blessing are exceptionally stealthy and often have excellent night vision, but struggle when standing in the light. Some are literally bothered by bright light, most are at least uncomfortable when being the center of attention.
Itzl: Itzl is the Old One of cold blooded beasts. He is associated with cunning, strength, and speed. The aspects of a hunter. Those with his blessing have a kinship or affinity with wild beasts, especially predators, but they sometimes have trouble relating to people.
Potec: Potec is said to be one of the top Old Ones on the same tier as Chotec and Tepoc, but as far as I know, is only mentioned briefly in the seventh edition Lizardmen book and no others. Potec is "he who wards against the supernatural.”
Quetli: Quetli is a woefully underdeveloped war god only mentioned briefly once in the seventh edition Lizardmen book. He is called “Protector of the True Way.” I suspect that the writers meant to lift Quetzl from the earlier editions and made a typo since Quetzl.
Quetzl: Apart from Sotek, the Old One Quetzl is the premier warrior god of the Lizardmen. Whereas Sotek is all about rending one’s enemies, Quetzl’s focus on being resilient in the face of danger. Magical items associated with Quetzl bestow protection. Those with Quetzl’s blessing are often unusually tough and resilient but sometimes slow to act.
Rigg: Rigg is the Old One known as “the Outcast” and one of the very few Old Ones referred to in a feminine context. Yet more evidence GW writers don’t like women. Rigg is written on the sacred plaques to be the “Mother of Kalith”, yet none of the First know who "Kalith" is.
Sotek: Arguably not an Old One at all since his first appearance is well after the Great Cataclysm. Also, unlike the other Old Ones Sotek occasionally does mighty things. Sotek worship took off among the Skinks when Tehenhauin led his beleaguered people while the Slann contemplated their navels over the lost plaque of Chaqua. Sotek is invoked in battle a lot, and the desire to obtain sacrifices to Sotek is a major motivator for the First. References to Sotek are too numerous to mention. Sotek’s color is nearly always associated with the color red. Those blessed by Sotek are normally brave and ferocious, but sometimes reckless
Tepok: Tepok is the Old One of magic. Sometimes depicted as a feathered serpent of the air. Tepok is frequently associated with the color purple. As the god of magic, he has been associated with many varied magical items over the several editions Lizardmen have existed. Those blessed by Sotek have magical abilities, or least magic resistance. They have keen minds but are sometimes aloof.
Tlazcotl: Tlazcotl is the Old One that represents the beneficial aspects of being coldblooded. Being able to remain unmoved and unflinchingly dedicated to their task. Generally Temple Guard are claimed to enjoy Tlazcotl’s blessing.
Tlanxla: Tlanxla isn’t developed much. He’s an Old One of war and rode a chariot across the sky, yet Lizardmen have no flying chariot options in their army, what gives? In the 5th through 8th edition books, only once that I’m aware of is he talked about outside the context of empowering Kroq-Gar’s magic spear. He embodies the warlike nature of the Lizardmen. Not sure what that means since at least half of the Old Ones have a clear martial aspect to them.
Tzunki: Tzunki is the Old One of water. Besides being associated with the beneficial aspects of water, Tzunki is also associated with agility, keen eye sight, and speed. Sometimes he associated with the sea green color. Sometimes he is associated with mottled colors. Those blessed by Tzunki are good swimmers and may have functional gills in addition to lungs making them truly amphibious. They are often agile and fast, but sometimes a little mercurial and flighty,
Uxmac: This Old One is the messenger of the gods and expected to return someday bearing the word of the Old Ones. Makes sense, if only one of the Old Ones came back to the mortal world, I would expect it to be the one whose job was to run messages to the mortal world.
Xhokha: This Old One “is the spirit of stone, the giver of strength, and the "Arbiter of Duty.”
Xhotl: Xhotl is mentioned briefly as the Old One that is namesake of the city of Xhotl and the chooser of those destined for greatness.
Xholanka: Xholanka is an Old One known as “The Lost” and reference with seemingly vague and contradictory refernces to any “but the deepest intellect.” In Scalenex’s writing, those marked by Xholanka (anyone with “kai” in the name) are more or less both blessed and cursed. In addition to Xholanka who is entitled “the Lost,” sacred plaques mention Conalxa, Inhamex, and Yuxa as being Old Ones but there is no context as to what these lost gods did. Other Old Ones are presumed completely forgotten.
Xapati: Xapati is not developed much. Presumably he is the Old One of revenge. He is associated with the 6th edition magical item the Blood Statuette of Spite and is not mentioned elsewhere.