Sin is called the father of the gods, but in a metaphorical rather than in a real sense.

The only one of his children who takes an important part in the later phases of Babylonian-Assyrian worship is his daughter Ishtar.

She seems to have taken to herself some of the traits of right belonging to Sin, and the prominence of her worship may be regarded as an additional factor in accounting for the comparative obscurity to which Sin gradually is assigned.

At all events, Sin is a feature of the earlier period of the Babylonian religion rather than of the later periods.
Innanna.
The secondary position held by the female deities in the Babylonian pantheon has been repeatedly referred to.

This trait of the religion finds an illustration not only in the 'shadowy' character of the consorts of the gods, but also in the manner in which goddesses, originally distinct from one another and enjoying an existence independent of any male consort, lose their individuality, as it were, and become merely so many forms of one and the same deity.