“Many 'theophoric' names including the divine name Qos have been found in Edom. Accordingly, it has been assumed that Qos was the main Edomite deity. However, nothing is known about Qos worship since no public cult is found in Edom. Neither is the interpretation of Qos as the main Edomite deity supported by the biblical writings, where this name is never mentioned. In fact, the name of no other Edomite is mentioned. This situation contrasts with the explicit mention of Chemosh and Milkom as the 'national' deities of Moab and Amon respectively.

This silence about the Edomite deity is probably not incidental. Edom, the bitter enemy of Israel, is never blamed for idolatry by the prophets. This suggests that Edom did not oppose Israel in the name of any other god. (pp. 390-391)

from 'Yahweh, the Canaanite God of Metallurgy?', JSOT 33.4 (2009): 387-404”