The Name:
Irish in origin, it is from the Gaelic Craobhach, meaning “branch”.
Originally from Clare, according to some sources, while more (1) place them in Ulster before Clare..
The Connection
The Doppings married into them, in Ballinamona in Waterford.
Reference:
(1) https://www.libraryireland.com/AnglicisedSurnames/Creagh.php
(2) https://www.johngrenham.com/findasurname.php?surname=Creagh