The name doesnt appear in the Manx RoH but I had info from Mike Perry - Windsor, Robert, 10th King's Liverpool, originally from Pulrose, killed 16 June 1915] - see http://www.isle-of-man.com/manxnotebook/fulltext/gw1922/apx1.htm
This list was compiled from several sources but mostly it seems the names in the Examiner Annuals - I have transcribed these (see http://www.isle-of-man.com/manxnotebook/exans/index.htm) but his name does not appear on them. Possibly this means that by then he had no relative on the Island to inform the Press.

There was in 1863 John Windsor corn miller at Pulrose Mill - long shot but Windsor name not that common on Island.