I'm descended from a Penelope Galgey, born 1810 in Cork City. It's a very rare surname and I always take an interest in it.
Mark Dorney's DNA has been tested for genealogical purposes. It may be possible to confirm family relationships by comparing test results with Mark or other carriers of his ancestors' Y-chromosome or mitochondrial DNA.
It is likely that these autosomal DNA test-takers will share DNA with Mark:
AncestryDNA, GEDmatch A700575, Ancestry member msdorney