 Gilli was an eleventh-century Hebridean chieftain whose career coincided with an era of Orcadian overlordship in the Kingdom of the Isles. According to mediaeval saga-tradition, Gilli was a brother-in-law of Sigurðr Hlǫðvisson, Earl of Orkney, having married the latter's sister Hvarflǫð. Traditionally regarded as one of the most powerful Orcadian earls, Sigurðr appears to have extended his authority into the Isles in the late tenth century, and Gilli apparently acted as Sigurðr's viceroy or tributary earl in this region. Gilli's name is probably Gaelic in origin, and he seems to have seated himself on either Coll or Colonsay, islands in the Inner Hebrides. It is possible that Gilli is identical to Gilla Ciaráin mac Glún Iairn, an Uí Ímair dynast who was slain at the Battle of Clontarf in 1014. If not, another possibility is that he was the father of a certain Conamal / Conmáel who was killed in 980.
