Jacob John Thompson was the son of David and Mary Thompson of Liverpool.
Naval records give his next of kin as his grandmother, Dora Smith, of 3 Eldon Place, Liverpool.
He was lost on the 9th October 1917 when the H.M.S. Champagne was torpedoed and sunk by a German submarine U-96 when 8 miles SW of the Calf of Man, with the loss of 58 lives.
For further biographical details see Our Lady of Reconciliation War Memorial