Ocelus is a Celtic god known from three inscriptions in Roman Britain. He is twice invoked on dedications at Caerwent: one stone is the base of a state of which only a pair of human feet and a pair of goose feet survive. The invocation is to Mars Lenus or Ocelus Vellaunus and the "numen" (spirit) of the emperor, and was dedicated on 23 August AD 152. The second Caerwent inscription dedicates an altar to Mars Ocelus. The god was also venerated at Carlisle, where he was once more equated with Mars and again linked to the imperial cult. So Ocelus seems to have been a British, perhaps Silurian god, associated with Mars, probably in the latter's Celtic capacity as a protector. At Caerwent he is linked with Lenus, a Treveran healing deity, and with Vellaunus, who is recorded among the Gaulish Allobroges. Celtic polytheism refers to the religious beliefs and practices of the ancient Celts. ... Caerwent is a village in Monmouthshire, Wales. ... Mars was the Roman god of war, the son of Juno and either Jupiter or a magical flower. ... Lenus was a Celtic healing god sometimes equated with the Celtic god Iovantucarus (apparently as a protector of youth) and the Roman god Mars. ... Carlisle is a city in the far north-west of England, located 16km from the border with Scotland. ... The Silurian is a major division of the geologic timescale that extends from the end of the Ordovician period, about 443. ... A map of Gaul showing the relative position of the Allobroges tribe. ...

References

Dictionary of Celtic Myth and Legend. Miranda Green. Thames and Hudson Ltd. London. 1997