Rudras refer to the forms of the god Rudra, whose traditions have since been associated with lord Shiva. They make up eleven of the thirty-three gods in the Vedic pantheon. They are at times identified with the storm deities referred to as Maruts, while at other times considered distinct from them.

While the Vamana Purana describes Rudras as the sons of Kashyapa and Aditi, Maruts are described distinct from the Rudras as the 49 sons of Diti, sister of Aditi, and the attendants of Indra, rather than Rudra.

The Ramayana tells they are eleven of the 33 children of the sage Kashyapa and his wife Aditi, along with the 12 Adityas, 8 Vasus and 2 Ashvins, constituting the Thirty-three gods. The Vamana Purana describes the Rudras as the sons of Kashyapa and Aditi. The Matsya Purana notes that Surabhi – the mother of all cows and the "cow of plenty" – was the consort of Brahma and their union produced the eleven Rudras. Here they are named

The Harivamsa, an appendix of the Mahabharata, makes Kashyapa and Surabhi – here, portrayed as his wife – the parents of the Rudras. In another instance in the Mahabharata, it is Dharma (possibly identified with Yama) who is the father of the Rudras and the Maruts.

The Vishnu Purana narrates that Rudra – here identified as Shiva . The furious Rudra was in Ardhanari form, half his body was male and other half female. He divided himself into two: the male and female. The male form then split itself into eleven, forming the eleven Rudras. Some of them were white and gentle; while others were dark and fierce. They are called:

From the woman were born the eleven Rudranis who became wives of the Rudras. They are:

Brahma allotted to the Rudras the eleven positions of the heart and the five sensory organs, the five organs of action and the mind. Other Puranas call them Aja, Ekapada, Ahirbudhnya, Tvasta, Rudra, Hara, Shambhu, Tryambaka, Aparajita, Ishana, Tribhuvana.

In one instance in the epic Mahabharata, the Rudras are eleven in number and are named: