Matsyapurana 5.30

5.30

sāvitraśca jayantaśca pinākī cāparājitaḥ
ete rudrāḥ samākhyātā ekādaśa gaṇeśvarāḥ //

Vâmadevas, _i.e._, Rudras, the creators of the Immortals, are eleven in number; _viz._: Ajaikapâda, Ahirbudhnya, Virûpâkṣa, Raivata, Hara, Bahurûpa, Tryamvaka, Sâvitra, Jayanta, Pinâkî, Aparâjita. The eleven Rudras were created by the mind of Brahmâ each holding a trident in his hand. An account of their having created a race of Immortals, numbering 84 crores, has been given before. The Rudras pervade and protect the universe and have begotten many children from the womb of Surabhî.—29-32.