Two John Monk baptisms on family search Chelsea & St Marylebone but none Spitalfields.
1841 Crown Court in Quaker Street, Christchurch, Whitechapel, Middlesex
1851 Pools Place, Quaker Street, Christchurch, Whitechapel, Middlesex
All born Spitalfields, except Elizabeth Shoreditch
John Monks Head 43 1808 Silk Weaver
Elizabeth Monks Wife 42 1809 Silk Weaveress
Ann Monks Daughter 13 1838 Servant
Sarah Monks Daughter 12 1839 -
John Monks Son 10 1841 -
William Monks Son 9 1842 -
Thomas Monks Son 6 1845 -
Mary Monks Daughter 4 1847 -
Henry Monks Son 0 1851 -
I cannot find any of them after 1851?
Sorry I cannot help.
Colin