The gnews - parents and a number of children - left Ireland in the 1840's, at the time of the potatoe famine. They became ill during the voyage, died soon after arriving in Canada and are buried somewhere on the North Shore of the St. Lawrence.
All my information comes from the books writen by Carol Bennett, Carol Bennett McCuaig, The books are, "Founding Families of Grattan & Wilberforce" and "Founding Families of Bromley Township", there is more information on the families you are looking for in those books, its a lot to type, lol.
Carol is still selling the books until she is out of them, closing shop. You will find a ton of information like this in them. I have all Juniper books, I will check my others when I have time. Check the Juniper home page. firstname.lastname@example.org