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 The earliest concrete historical references to Jews in Scotland are from the late 17th century.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.
Maxima Caesariensis Maxima Caesariensis (Latin for "The Caesarian province of Maximus"), also known as Britannia Maxima, was one of the provinces of the Diocese of "the Britains" created during the Diocletian Reforms at the end of the 3rd century. It was probably created after the defeat of the usurper Allectus by Constantius Chlorus in  296 and was mentioned in the c. 312 Verona List of the Roman provinces. Its position and capital remain uncertain, although it was probably adjacent to Flavia Caesariensis. On the basis of its governor's eventual consular rank, it is now usually considered to have consisted of Augusta or Londinium (London) and southeastern England.