1891 census :
57 Victoria St. N (North?), Walker, Longbenton,
Margaret Keirven, head, wid, 42, b. Northumberland Longbenton,
James Keirven, son, 13, Shipyard Labourer, b. Northumberland Longbenton,
Joseph Keirven, son, 10, b. Northumberland Longbenton,
Martin Keirven, son, 8, b. Northumberland Longbenton,
William Grace, boarder, S, 39, Shipyard Labourer,
John Simmons, boarder, S, 41, Shipyard Plater,
Charlie McDonald, boarder, M, 45, Shipyard Labourer, b. Scotland
RG12/4232/23/40
Death on FreeBMD, Mar 1887, Tynemouth, Patrick Kervin, age 49.
I think you will need to get one of Patrick/Margarets childrens birth certs to get Margarets maiden name, to help you get further back.
Alan.