Hi,
I'll be sure to check out your tree. I had done some general research on Florence McCarthy and found references that indicated this name, used for males belonged to the McCarthy Reagh. You post would seem to confirm what we were told in Ireland that only one branch used the Florence name. I do have an intact male line and have wondered if it would be worthwhile to try this avenue. Our direct male line is fading out so perhaps this is indeed a good time to do this.
Joyce