Under which Roman Emperor's effective conquest of Britain was it possible that Jews visited Scotland?
History of the Jews in Scotland The earliest date at which Jews arrived in Scotland is not known. It is possible that Jews visited Scotland at the time of the Roman Empire's conquest of southern Britain, but there are no records of this. The earliest concrete historical references to Jews in Scotland are from the late 17th century. The vast majority of Scottish Jews today are Ashkenazi who mainly settled in Edinburgh, then in Glasgow in the mid 19th century. Most histories of Jews in Scotland deal with the subject from a British perspective, thus tending to marginalise any distinctly Scottish dimension.
Riothamus Riothamus (also spelled Riutimus or Riotimus) was a Romano-British military leader, who was active circa AD 470. He fought against the Goths in alliance with the declining Roman Empire. He is called "King of the Britons" by the 6th-century historian Jordanes, but the extent of his realm is unclear. Riothamus is a Latinization of the Brythonic personal name "*Rigotamos", meaning 'king-most', 'supreme king' or 'highest king'. Though it is still a matter of debate, several scholars consider his life to have been one of the possible sources for the King Arthur legend.