Gods, in general, tend to be gods of something in particular — in both fictional and real-life pantheons, each god is assumed to have some aspect of reality they rule over or are responsible for. When inventing a Fantasy Pantheon, there are a number of god archetypes that seem unavoidable — gods of the sun, the sea, war, knowledge and so on are almost always present. Maybe because their role is convenient for the story, easily understandable due to familiarity with Real Life mythologies.