Don't know if this will get you any descendants but will eliminate some people.
Re 1911 census, a granddaughter Eva C Jones, b June 1899 was with Auagustus and Sarah in Goderich.
WW1 Attestation
Alfred Charles Cornell, living Saskatoon Saskatchewan, b London England, 13 Jan 1872, next of kin: Sarah Cornell, mother of Goderich Ont, occupation: cook, previous military: 33 Huron Regiment [4yrs] and 12th York Rangers [1yr].
Signed up 13 Nov 1915 at Saskatoon.
No listing that he was killed in the war.
Albert Cornell, son of Sarah Cornell of Goderich was killed in WW1, 31 Mar 1918. Buried in Bellacourt Military Cemetary, Pas de Calais, France.
WW1 site is on
http://www.collectionscanada.gc.ca/databases/cef/001042-100....1901 and 1911 census on
www.automatedgenealogy.comEva May's birth registration
Jones, Eva May [Cornell], b 6 June 1899, Arthur Ed Jones & Alice M Cornell, Huron County.
* In accord with this Declaration attached to this registration the name Eva May Jones is altered to Eva Cornell Jones.
According to 1901 census Arthur and Alice [ who immigrated from England 1873] also have another daughter, Mabel b 15 Aug 1894, Ontario.
Canada-US crossing
Jones, Alice E, 44, Mable 15 and Eva 10 crossed the border at Detroit Michigan February 1910. Final destination, Detroit. Contact in Canada is Augustus Benjamin Cornell of Goderich.
Eva must have been back visiting her grandparents on 1911 census.