A different “Thomas S Kennedy” (did the first one die)?, age, estimated year of birth, place of birth, from the 1881 England Census taken on the night of 3 April 1881, for the Civil Parish of Belford, Northumberland, England found in December 2023:
Address: High Street, Belford
John Kennedy, Head, Married, age 44, Inspector of Police, Born Scotland [circa 1837]
Jessie Kennedy, Wife, Married, age 44, Born Scotland [circa 1837]
Janetta Kennedy, Daughter, age 15, Born Allendale Northumberland England [circa 1866]
David Kennedy, Son, age 13, Scholar, Born Scotland [circa 1868]
John E. Kennedy, Son, age 12, Scholar, Born Ovingham Northumberland England [circa 1869]
Elizabeth A. Kennedy, Daughter, age 9, Scholar, Born Morpeth Northumberland England [circa 1872]
Thomas S. Kennedy, Son, age 3, Born Belford Northumberland England [circa 1878]

Entry in the 1891 England Census taken on the night of 5 April 1891 for the Civil Parish of Wooler, Registration District of Glendale, Northumberland, England, found in December 2023:
Address: Police Station
John Kennedy, Head, Married, age 54, Superintendent of Police, Employed, Born Scotland [circa 1837]
Jessie Kennedy, Wife, Married, age 54, Born Scotland [circa 1837]
David Kennedy, Son, Single, age 23, Bank Teller, Employed, Born Scotland [circa 1868]
Janetta Kennedy, Single, age 24, Daughter, Born Allendale Northumberland England [circa 1867]
Thomas S Kennedy, Son, age 13, Scholar, Born Belford Northumberland England [circa 1878]
George D Glass, Visitor, age 22