preface to Moores Surnames + placenames (www.manxnotebook.com/fulltext/sn1890/preface.htm) The mountain now called South Barrule was formerly called Wardfell, so that a portion of it is still known by that name, modified into Warfield. Thus the actual forms in use are Barrule and Warfield, and these can be shown to be two forms of one and the same Norse name Vorðfjall, meaning 'Beacon Fell.'