The distribution has a north-west to south-east gradient, with the highest concentrations occurring on the islands of the Outer Hebrides.
A common suffix for offshore islands in the north of Scotland is "-holm", derived from the Old Norse holmr, meaning a 'small and rounded islet'.
[12][13][14] This list excludes artificial crannógs and the numerous small freshwater islands with no recorded name.
Inchlonaig and Inchcruin[Note 5] are classified by the National Records of Scotland as "inhabited islands but had no usual residents at the time of either the 2001 or 2011 censuses.
The loch's water levels have fluctuated so some of them may have been islands in recent history, as the promontory on which Kilchurn Castle stands once was.
[25][26] There are numerous unnamed small islands in mainland lochs, including those where the water level has been artificially raised by the creation of dams for the production of hydro-electricity.