Judging by the Bruce Y-DNA Project, it appears that King Robert the Bruce could have belonged to R1b-S7432, which is right below DF27>ZZ12>ZZ41:
https://www.familytreedna.com/public/bruce?iframe=yresults
https://www.familytreedna.com/groups/bruce/about/goals
http://www.ytree.net/DisplayTree.php?blockID=1032&star=false
https://www.familytreedna.com/public/bruce?iframe=yresults
https://www.familytreedna.com/groups/bruce/about/goals
http://www.ytree.net/DisplayTree.php?blockID=1032&star=false