Variant SpellingMacAdie. 
Variant SpellingMcAdy. 
Variant SpellingMcCady. 
Variant SpellingMacKaddie. 
DNA Study(FTDNA) FamilyTree DNA project pages
WebLink(WTyDNA) YDNA tested McADIEs on Wiki Tree and their ancestors (you might need to tweak the search to get name variants!) 
DNA Study(Details) DNA Surnames - detailed project information
WebLink(Family History Soc.) Caithness Family History Society
WebLink(Forum) forum
WebLink(Rootsweb) Caithness Message Board
Blog(Google) Blog aka Project Diary. 
Last Edited13 Dec 2021

Sub haplogroups/tested lineages/testees