Robert apparently came to the U.S. from Canada. His son Matthias was born in Nova Scotia ca 1831. Robert and Anna could have married there, too.
In the 1850 census Robert and family are in Northampton Township, Summit, OH: Robert 46 Ireland, Anna 48 Ireland, Mattheas 19 Nova Scotia, Eliza 16 OH, Harriet 13 OH, Wm. W. 6 OH.
Robert is in the 1859 Cuyahoga Falls city directory on page 128 as HARRISON Robt. lab. w s Newberry s of Prospect; laborer west side of Newberry south of Prospect. Miss Harriet HARRISON is listed at the same address.
Your line is through which of the children? I have some information on Mathias' line if you are interested.