Marked by the Ordnance Survey as a spring, this well gives clear fresh water though within a few metres of high water. Eņin is the old form of the name John, used in the Gaelic Bible for both John the Baptist and John the Evangelist in the New Testament, almost completely replaced in modern Scottish Gaelic by Iain, and in Ireland by Seįn. One local tradition associates this spring with a John Mackay, but others take it to be a holy well dedicated to one of the biblical saints. There are several such wells in Ireland commemorating the Baptist, including this S5661 : Holy Well at Johnswell (Tobar Eoin) in Co. Kilkenny which was the scene of a midsummer festival on St John's Eve, 23rd June.
The present concrete surround is modern. The well also gives its name to the nearby house NG2149 : Tobar Eòin.
The house is Tobar Eņin, and can be seen in more detail in NG2149 : Eilean Dubh Beag]. The wind turbines on the far horizon belong to the Ben Aketil wind farm in NG3247 and lie about 12km ESE.