Jamboloydia

In the beginning there were only the two brothers Jamboloydia and Dragnuhl.
Jamboloydia was bored with his existence so he decided he wanted to create the material plane, the world as we know it today. Dragnuhl was jealous of his brother's creation and wanted to destroy it so they battled for eons and in the end Jamboloydia was victorious.
Although Jamboloydia was victorious he could not kill his brother so he created a prison for him in a realm that would later be known as hell. He cast out Dragnuhl from Celestia, the realm of the gods, and into hell. To this day Dragnuhl is still imprisoned in his cage in hell.
Jamboloydia wanted to see how his creation, the material plane and its dennisons, would progress without interference from him. So aside from ascending a few beings to godhood Jamboloydia leaves his creation be, and watches from his throne in Celestia.
Because of this non interference there has never formed any kind of church around the worship of Jamboloydia. Clerics and wise men have long ago concluded that Jamboloydia does not wish for worship and hence no one worships Jamboloydia although he is the creator of all things and the king of gods.