There is a Harold A. Knott who married a Lilian Patman in 1940 Woolwich, Kent
There is a couple with same names in passenger list going to Canada via New York in 1953.
New York, Passenger Lists, 1820-1957 about Harold Knott Name: Harold Knott Arrival Date: 1 Jan 1953 Birth Date: abt 1916 Age: 37 Gender: Male Ethnicity/ Nationality: British (English) Place of Origin: Great Britain Port of Departure: Southampton, England Port of Arrival: New York, New York Ship Name: Ryndam
Image shows KNOTT Harold, age 37
Lilian, age 33
Beverley, age 7
David, age 4
all shows as from Great Britain and all show their destination as Ridgetown, Ontario
Here are births of those children
England & Wales, Birth Index: 1916-2005 about Beverley C Knott Name: Beverley C Knott Mother's Maiden Surname: Patman Date of Registration: Oct-Nov-Dec 1945 Registration district: Tonbridge Inferred County: Kent Volume Number: 2a
England & Wales, Birth Index: 1916-2005 about David J Knott Name: David J Knott Mother's Maiden Surname: Patman Date of Registration: Jan-Feb-Mar 1948 Registration district: Dover Inferred County: Greater London, Middlesex Volume Number: 5b
I have not been able to find obits for Harold and Lilian - I suppose it is possible they could still be living??