Shiva is known as "The Destroyer" within the Trimurti, the Hindu trinity that includes Brahma and Vishnu. In Shaivism tradition, Shiva is one of the supreme beings who creates, protects and transforms the universe. In the Shaktism tradition, the Goddess, or Devi, is described as one of the supreme, yet Shiva is revered along with Vishnu and Brahma. A goddess is stated to be the energy and creative power (Shakti) of each, with Parvati (Sati) the equal complementary partner of Shiva. He is one of the five equivalent deities in Panchayatana puja of the Smarta tradition of Hinduism.
The iconographical attributes of Shiva are the serpent around his neck, the adorning crescent moon, the holy river Ganga flowing from his matted hair, the third eye on his forehead, the trishula or trident, as his weapon, and the damaru drum.
Shiva as we know him today shares many features with the Vedic god Rudra, and both Shiva and Rudra are viewed as the same personality in Hindu scriptures. The two names are used synonymously. Rudra, the god of the roaring storm, is usually portrayed in accordance with the element he represents as a fierce, destructive deity.
The oldest surviving text of Hinduism is the Rig Veda, which is dated to between 1700 and 1100 BC based on linguistic and philological evidence. A god named Rudra is mentioned in the Rig Veda. The name Rudra is still used as a name for Shiva. In RV 2.33, he is described as the "Father of the Rudras", a group of storm gods.
The hymn 10.92 of the Rigveda states that deity Rudra has two natures, one wild and cruel (Rudra), another that is kind and tranquil (Shiva). The Vedic texts do not mention bull or any animal as the transport vehicle (vahana) of Rudra or other deities. However, post-Vedic texts such as the Mahabharata and the Puranas state the Nandi bull, the Indian zebu, in particular, as the vehicle of Rudra and of Shiva, thereby unmistakably linking them as same.
Of several Indus valley seals that show animals, one seal that has attracted attention shows a large central figure, either horned or wearing a horned headdress and possibly ithyphallic, seated in a posture reminiscent of the Lotus position, surrounded by animals. This figure was named by early excavators of Mohenjo-daro as Pashupati (Lord of Animals, Sanskrit paśupati), an epithet of the later Hindu deities Shiva and Rudra.
Cernunnos is the conventional name given in Celtic studies to depictions of the "horned god" of Celtic polytheism. Over 50 examples of his imagery have been found from the Gallo-Roman period, mostly in north-eastern Gaul as well as among the Celtiberians. Cernunnos is depicted with antlers, seated cross-legged, and is associated with stags, horned serpents, dogs, bulls, and rats. He is usually holding or wearing a torc.
Due to the lack of surviving literature, details about his name, his followers, or his significance in Celtic religion are unknown. Interpretations of his role vary from seeing him as a god of animals, nature and fertility to a god of travel, commerce and bi-directionality.
With the advent of Christianity, Cernunnos came to be regarded as the anti-Christ or Satan
=== Shiva -Rudra -> Pashupati -> Cernunnos -> Satan ===
Horns, cross-legged, snakes
Same horned god cult
very very speculative: P = C Pashupati = Cernunnos? Pan = Cernunnos?
Sources:
https://en.wikipedia.org/wiki/Shiva#Destroyer_and_Benefactor
https://en.wikipedia.org/wiki/Pashupati_seal
https://en.wikipedia.org/wiki/Horned_deity