Many Gods and Godesses had different identities throughout history, some of them also falls under the category of "lesser" Demons, but it's just a formality since compared to us they are all Gods indeed.
The infos you are searching are about a concept rather than specific dieties, these two twins were water deities in the Zoroastrianism, rappresenting the male and female energy side of astral power which is one of the many things the water element rappresent.
These are often stolen concepts like in this case too. Zoroastrianism was one of the many wicked programms the enemy created in order to twist and steal ancient knowledge. I suggest you to study further the material provided in order to avoid deception of this kind and recognize them on sight.