I have been working on a book on the VOLLICK (FOLLICK) family of Ontario for many years now. Have you seen my pages online at http://olivetreegenealogy.com/nn/surnames/http://olivetreegenealogy.com/nn/surnames/
Choose VAN VALKENBURG from the list of surnames, then there is a clickable link to VOLLICK from there. The immigrant ancestor of the Vollick/Follick families was Isaac Van Valkenburg, a Loyalist in BUtler's Rangers who settled near present day St Catharines Ontario
I can give you the ancestry of your Percy Vollick back to Isaac the Loyalist and beyond him, to the 1600s in New YOrk. It is all documented.
Elizabeth Finnegan was the d/o Peter F. and Ellen Bradt, so you are a double Bradt descendant. There is info on that family on OliveTreeGenealogy too.