Whether your oldest CASSIDY ancestor is a male or female, DNA testing can help to identify your ancestral Cassidy line. However, you may need to apply different DNA analysis techniques before you can confirm your Cassidy pedigree and to be confident of valid connections back to Ireland where most Cassidy's originate.
There are three DNA tests that might help depending on where your Cassidy sits in your pedigree:
* Autosomal-DNA test at AncestryDNA, Family Tree DNA, My Heritage or 23andMe - for both males and females whose ancestry is expected to be Cassidy on any of their ancestral lines;
* Y-DNA test at Family Tree DNA - for male CASSIDY's whose ancestry is expected to be Cassidy on their paternal line, ie. father, fathers father, fathers paternal grandfather, etc;* mt-DNA test at Family Tree DNA - for both males and females whose ancestry is expected to be Cassidy on their oldest maternal line ancestor, ie.mother, mothers mother, mothers maternal grandmother, etc.