In the July to September 1839 birth index John Thomas Brown, St. Albans, Hertfordshire, volume 6, page 428.

In the 1841 census Holywell Hill, St. Albans, Hertfordshire.
Francis Marshall Brown, age 27, music master, born in Hertfordshire.
Hannah Brown, age 28, not born in Hertfordshire.
Francis Henry Brown, age 5, born in Hertfordshire.
Hannah June Brown, age 3, born in Hertfordshire.
John Thomas Brown, age 1, born Hertfordshire.
Frederic Brown, age 2 weeks, born Hertfordshire.
1 female servant.
Thomas Brown, age 50, parish clerk, born Hertfordshire.

Parish records Abbey, St. Albans, Hertfordshire
Baptism February 1844 John Thomas Brown, father Francis Marshall Brown, mother Hannah Brown. [This seems unusually late for a baptism.]

In the 1851 census St. Peters Street, St. Albans, Hertfordshire.
Head Francis M. Brown, age 37, Professor of Music, born St. Albans, Hertfordshire.
Wife Hannah I. Brown, age 37, born St. Giles, Middlesex.
Son Francis Brown, age 15, scholar at home, born St. Albans.
Son John F. Brown, age 12, scholar at home, born St. Albans.
Son Frederick D, Brown, age 10, scholar at home, born St. Albans.
Son George M. Brown, age 9, scholar at home, born St. Albans.
Son Edwin P. Brown, age 2, born St. Albans.

In the 1861 census Guilford Street, Luton, Bedfordshire.
Head Francis M. Brown, age 47, Organist, born St. Albans, Hertfordshire.
Wife Hannah Brown, age 47 [This differs from her baptism records.] born London, Middlesex.
Son John Brown, age 19, married, flocker?, born St. Albans, Hertfordshire.
Daughter in law Ann Brown, age 21, bonnet sewer, born Littleton, Hertfordshire.
Son Frederic Brown, age 16, shopman, born St. Albans.
Son Philip Brown, age 12, scholar, born St. Albans. 2 lodgers.
Grandson James Brown, age 1, born Luton. Grandson Frederic Brown, age 9 months, born Luton.

In the 1871 census New Town Road, Luton, Bedfordshire.
John Thomas Brown, age 31, Block Maker, born St. Albans, Hertfordshire.
Wife Ann Brown, age 33, born Berkhamsted, Buckinghamshire.
Son James Brown, age 11, scholar, born Luton, Bedfordshire.
Son Frederick Brown, age 10, scholar, born Luton.
Daughter Louisa Brown, age 8, scholar, born Luton.
Daughter Helen Brown, age 6, scholar, born Luton.
Son Francis Brown, age 5, scholar, born Luton.
Daughter Agnes Brown, age 3, scholar, born Luton. Son Joseph Brown, age 1, born Luton.

In the 1881 census 55 Boyle Street, Luton, Bedfordshire.
Head John Brown, age 41, straw hat block maker, born not known.
Wife Ann Brown, age 67 [obviously an error], straw hat sewer, born Berkhampsted, Hertfordshire.
Son James Brown, unmarried, age 21, straw hat blocker, born Luton.
Daughter Hellen [as spelled] Brown, unmarried, age 16, straw hat sewer, born Luton.
Son Frank Brown, age 15, errand boy, born Luton.
Daughter Agnes Brown, age 12, scholar, born Luton.
Son Joseph Brown, age 10, scholar, born Luton.
Daughter Kate Brown, age 8, scholar, born Luton.
Son John Brown, age 4, born Luton.

In the 1891 census 30 Princess Street, Luton, Bedfordshire.
Head John Brown, age 53, straw hat block maker, employed, born St. Albans, Hertfordshire.
Wife Ann Brown, age 54, straw hat finisher, employed, born Berkhampsted, Hertfordshire.
Daughter Louisa Brown, single, age 27, straw hat machinist, employed, born Luton, Bedfordshire.
Daughter Agnes Brown, single, age 22, straw hat finisher, employed, born Luton.
Son John Brown, age 14, errand boy, born Luton.

In the 1901 census 57 Dunfries Street ,Luton, Bedfordshire.
Head John Brown, age 64, block maker, worker, born St. Albans, Hertfordshire.
Wife Ann Brown, age 66, born Great Berkhampsted, Hertfordshire.
Son John Brown, single, age 23, assistant blocker, worker, born Luton.

In the 1911 census 57 Dunfries Street, Luton, Bedfordshire.
Head John Brown, age 71, block maker for straw hats, worker, born St. Albans, Hertfordshire, deaf 10 years.
Wife Ann Brown, age 73 married 51 years, 10 children born alive, 8 still living, no occupation, born Great Berkhampsted, Hertfordshire.
Daughter Kate Brown, age 36, single, straw hat finisher, worker, born Luton.
The house has 5 rooms.

His son John Thomas Brown’s military record says his parents died before 1917.
There are two possibilities in the death index
In the January to March 1915 death index John T. Brown, died age 73, Luton, Bedfordshire, volume 3b, page 757
or
In the October to December 1911 death index John Brown, died age 71, Luton, Bedfordshire, volume 3b, page 427.