A' Chùli is an uninhabited island in the Garvellachs in the Firth of Lorn, in the council area of Argyll and Bute, Scotland. It is in extentRick Livingstone’s Tables of the Islands of Scotland (pdf) Argyll Yacht Charters. Retrieved 12 Dec 2011. and lies between Garbh Eileach and Eileach an Naoimh, the two largest islands of the archipelago. Grob nan Sgarbh, Sgeir Leth a' Chuain and Sgeir nam Marag are small skerries offshore to the southwest.
An earlier name of the island was meaning "Brendan's retreat" and Brendan the Navigator is reputed to have built a chapel and been buried there. However, no trace of the chapel is visible and a similar fate appears to have befallen two unroofed buildings, thought to be shielings, recorded in 1881 by the Ordnance Survey.
On 7 March 1981 a fishing boat foundered approximately northwest of the island.
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