suggest you order the two sheet large scale is the 2-sheet 1:25,000 Isle of Man Public Rights of Way and Outdoor Leisure Map which gives considerably more detail though it can be a little too large for convenience whilst walking. Sometimes also too much detail is shown as the sheets use the 6" (1:10,000) as the base map reduced in size thus making some details visible only under a magnifying glass! Only one I know that gives most of the names - you can order via web from most Island book shops - see http://www.isle-of-man.com/manxnotebook/publshrs/index.htm
My own copy of map is not at present accessible but I think its (unmarked) position might be seen on http://www.isle-of-man.com/manxnotebook/parishes/sn/sm_1826.htm to the right of Ballakew on the otherside of the river (Santon burn) where the river has a little fork