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The official Y-DNA haplogroup for the Mac Diarmada Lords/Kings of Moylurg is:
R1b-M222 > S658 > DF104 > DF105 > A18726 > A259 > A260 > FGC5939 > A6925 > FT219063 > BY20594 > BY20593( Teige Mor ) > FT441685
You can read more about the evidence here: