Complex sentence: The Old Norse name for the Hebrides during the Viking occupation was "Suðreyjar", which means "Southern Isles"; in contrast to the "Norðreyjar", or "Northern Isles" of Orkney and Shetland.
Split into simpler sentences: The Old Norse name for the Hebrides during the Viking occupation was "Suðreyjar", which means "Southern Isles". It was given in contrast to the "Norðreyjar", or the "Northern Isles" of Orkney and Shetland.