The new diocese covered the Hebrides and the other islands along the west coast of Scotland. The name in the original Norse was Súšreyjar or Sudreys, or "southern isles", in contrast to the Noršreyjar, the "northern isles" of Orkney and Shetland. The Isle of Man was included within these southern isles. But it is not known from what date this became effective: it may have been in the time of Magnus Barefoot (1098). The political connection of Man as of all these islands with Norway was severed in 1266, when they were ceded to Scotland. The Isle of Man was detached from the Scottish islands in 1334 and finally came to depend on England.
In 1458 the diocese was transferred by Pope Calixtus III to the Province of York in England. King Henry IV gave the island to the Stanleys, who thus acquired the patronage of the bishopric, but the bishops never attained the status of lords spiritual of the English Parliament. The cathedral, dedicated to St. Germain, was situated on St Patrick's Isle at Peel (the only city on Man) and was built in 1245 on the site of an earlier building. It is possible that the origin of the name "Sodor" was lost and its meaning was applied to this islet as the seate of the bishop. The present Anglican diocese is called "Sodor and Man". The termination "and Man" appears to have been added in the 17th century and the designation "Sodor and Man" had become a fixture by 1684.