Khors

In Slavic mythology, Hors (Old Church Slavonic: Хърсъ, Cyrillic: Хорс) is the Slavic sun god.

The name Hors comes from the Iranian languages (Scythian or Sarmatian) — see Avestan divinity Hvarə хšаētəm, Middle Persian: xvaršêt, Persian: xoršid‎‎ (خورشید or خرشید) "Sun". From this words derives the name of Greater Khorasan and Khorasan Province, possibly also Khwarezm, meaning "land where the sun rises".

According to the Rus' Primary Chronicle, in 980, Vladimir I of Kiev "placed the idols at the hill outside the palace: wooden Perun… and Hors, Dažbog and Stribog and Simargl and Mokosh".

Based on the situation in the transfer of the gods of the pantheon of great prince Vladimir, the Hors was the second most important deity in this period. The author of Tale of Igor's Campaign provides the name of the Hors epithet Great.

Hypotheses about the functions of the god Hors based on the interpretation of the text of the Tale of Igor’s Campaign. It is believed that the Hors was the god of the solar disk. Hors moved across the sky during the day, and under the ground — at night. Based on a literal reading of the text Tale of Igor’s Campaign can be assumed and the existence of representations of the sacred "way of Hors", which Vseslav crossed somewhere between Kiev and Tmutarakan.

...
Wikipedia