Odin), (known today widely as Thor), and , respectively. The identity of the "Isis" of the Suebi remains a topics of debate among scholars. Later in , Tacitus also mentions a deity referred to as venerated by the Semnones in a grove of fetters, a sacred grove. Some scholars propose that this deity is in fact . A votive altar has been discovered during excavations at Housesteads Roman Fort at Hadrian's Wall in England that had been erected at the behest of Frisian legionaries. The altar dates from the 3rd century CE and bears the Latin inscription . In this instance, the epithet is a Latin rendering of Proto-Germanic theonym . This deity is generally interpreted by scholars to refer to . The goddesses referred to as and are otherwise unknown, but their names may refer to Old Frisian legal terms. In the sixth century, the Roman historian Jordanes writes in his that the Goths, an east Germanic people, saw the same "Mars" as an ancestral figure: Moreover so highly were the Getae praised that Mars, whom the fables of poets call the god of war, was reputed to have been born among them. Hence Vergil says: "Father Gradivus rules the Getic fields." Now Mars has always been worshipped by the Goths with cruel rites, and captives were slain as his victims. They thought that he who was lord of war ought to be appeased by the shedding of human blood. To him they devoted the first share of the spoil, and in his honor arms stripped from the foe were suspended from trees. And they had more than all races a deep spirit of religion, since the worship of this god seemed to be really bestowed upon their ancestor. C.C. Mierow translation Old English The Latin deity Mars was occasionally glossed by Old English writers by the name or . The genitive also appears in the name for Tuesday, . Viking Age and post-Viking Age By the Viking Age, had developed among the North Germanic peoples into . The god receives numerous mentions in North Germanic sources during this period, but far less than other deities, such as Odin, Freyja, or Thor. The majority of these mentions occur in the Poetic Edda, compiled in the 13th century from traditional source material reaching into the pagan period, and the Prose Edda, composed by Icelandic skald and politician Snorri Sturluson in