Parish Records St. Giles in The Fields, Camden.
November 29, 1807 John Symondson of Henry by Mary, born February 16, 1807

In the 1841 census Little Charles Street, Ossulstone (Holborn Division) hundred, Marylebone, St. Pancras district, Regents Park sub district.
John Symondson, age 30, bell founder, born Middlesex.
Eliza Symondson, age 25, born Middlesex.
In the 1841 census ages are rounded to 5 years and no relationships are given. This is the same sub district as Henry Symondson and the same district as Henry, James and Philip Symondson.

In the 1851 census living at 4 James Street. Lambeth Church First, Lambeth,
John Symondson, age 38, unmarried, comedian, born St Giles, Middlesex.
At this same address is
William Lilley, age 51, Carpenter Journeyman, born Conningsby, Lincolnshire
Wife Ann Lilley, age 50, born Thetford, Lincolnshire
Daughter Damaris? Lilley, age 17, envelope folder, born Thetford
Daughter Prescilla Lilley, age 8, born Newington Surrey.

In the 1861 census 1 Hooper Street, Lambeth district, Waterloo Road Second district, ecclesiastical parish St. Thomas.
Head William Daniels, age 48, engine fitter, born Hull, Yorkshire
Wife Rebecca Daniels, age 41, born Southamptob, Hampshire
John Symondson, age 45, comedian, born Marylebone, Middlesex.
Wife Eliza Symondson [not the Eliza above], age 27, born Tetford, Lincoln.
Son John C. Symondson age 5, born Lambeth.
Lodger Ann Harkess?, age 45, no occupation, born Ratcliff

In his son John Charles Symondson marriage record it lists his father as John Charles Symondson as well.

In the 1881 census 16 Dante Road, St. Mary’s Newington, Lambeth, London.
Head Charles [must be John C.] Symondson, age 25, printer press man, born Lambeth, Surrey.
Wife Ann Symondson, age 27, born High Onger, Essex.
Son William Symondson, age 2, born Southwark, Surrey.
Daughter Caroline Symondson, age 5 months, born Newington, Surrey.
Mother Eliza Symondson, widow, age 47, envelope folder, born Tetford, Lincolnshire.