my great grandfather was born Sydney Charles Grain, dob. 6 march 1894 northfleet kent to parents maria perks and thomas richard grain, married eveline dorothy mills (aka dorothy evelyn) 25 july 1914 gravesend kent. They had 2 children elfreda and lionel. Sydney is listed on elfredas marriage cert 3 dec 1938 as father deceased, but on lionels marriage cert 22 dec 1936 lionel has listed his uncle george as his father, on 27 march 1937, dorothy married james mcguire. on lionels death cert 9 july, 1976, sydney is again listed as father. i cant find Sydney Charles Grain, death cert. any ideas