His baptism has not been found so cannot yet identify his parents.  Remember, though, that his marriage certificate would include his father’s name.
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In 1841 he was with his wife and two children and what could well be his mother at Moorwood, Dean Forest, Ross, Gloucestershire:

First name(s)  Last name  Sex  Age  Birth year  Occ  Birth place
Richard    Knight   Male    25  1816 Coal miner  Gloucestershire
Hanah      Knight   Female  24  1817             Gloucestershire
James      Knight   Male     2  1839             Gloucestershire
Elizabeth  Knight   Female  3M  1841             Gloucestershire
Sarah      Knight   Female  55  1786 Lodger      Gloucestershire
James      Packett  Male    58  1783 ??????      Gloucestershire

Ref:
Archive reference  HO107
Piece number       364
Book number        7
Folio number       42
Page number        1
Combined:          HO107, piece 354, book 7, folio 42, p. 1

Moorwood was referred to in the header as Extra-parochial, perhaps accounting for the lack of baptisms of the parents.  The area was referred to as Dean Forest, perhaps now known as the Forest of Dean.
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In 1951 their family was at Moorwood, Westbury on Severn, Gloucestershire:

First name(s)  Last name  Relationship  Marital status  Sex  Age  Birth year  Occupation  Birth place
Richard    Knight  Head      Married    Male    36  1815  Coal Miner  High BeechGloucestershire
Hannah     Knight  Wife      Married    Female  35  1816  Wife        Ruardean, Gloucestershire
James      Knight  Son       Unmarried  Male    12  1839  At Home     Morwood, East Dean
Elizabeth  Knight  Daughter  Unmarried  Female  10  1841  At Home     Morwood, East Dean
Thomas     Knight  Son       Unmarried  Male     7  1844  At Home     Morwood, East Dean
Lydia      Knight  Daughter  Unmarried  Female   4  1847  At Home     Morwood, East Dean
Silvey     Knight  Daughter  Unmarried  Female   0  1851  At Home     Morwood, East Dean

Ref:
Archive reference  HO107
Piece number       1959
Folio              121
Page               2
Combined:          HO107, piece 1959, folio 121, p. 2
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In the 1861 census, he and his family were at Moorwood, East Dean, Westbury on Severn, Gloucestershire and somehow I think their son Emanuel had been misheard as Edmund by the enumerator:

First name(s)  Last name  Relationship  Marital status  Sex  Age  Birth year  Occupation  Birth place
Richard  Knight  Head      Married Male    44  1817  Coal Miner  East Dean, Gloucestershire
Hannah   Knight  Wife      Married Female  44  1817  -           Ruardean, Gloucestershire
Lydia    Knight  Daughter  Unmarried  Female  14  1847  -           East Dean, Gloucestershire
Thomas   Knight  Son       Unmarried  Male    16  1845  Coal Miner  East Dean, Gloucestershire
Sylvia   Knight  Daughter  -          Female  12  1849  -           East Dean, Gloucestershire
Fanny    Knight  Daughter  -          Female   7  1854  -           East Dean, Gloucestershire
Edmund   Knight  Son       -          Male     2  1859  -           East Dean, Gloucestershire
James    Knight  Son       Unmarried  Male    22  1839  Coal Miner  East Dean, Gloucestershire

Ref:
Archive reference  RG09
Piece number       1755
Folio              19
Page               11
Combined:          RG09, piece 1755, folio 19, p. 11
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By 1871 he was dead and this is the sole death from 1861 to 1871 in that district, though his age is a tad awry:

Name:                Age at Death (in years):  
KNIGHT, RICHARD      55  
GRO Reference: 1869  S Quarter in WESTBURY ON SEVERN  Volume 06A  Page 139
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Their marriage index:

First name(s)     RICHARD
Last name         KNIGHT
Marriage quarter  3
Marriage year     1837
MarriageFinder    RICHARD KNIGHT married one of these people
                  Hannah Bennett, Fanny Duberley, Sarah Griffiths, Elizabeth Dean
District          Ross
County            Herefordshire
Country           England
Volume            26
Page number       271
Record set        England & Wales Marriages 1837-2005
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No church marriage found.  Perhaps this was one of the first tegistry office marriages?  The Marriage certificate would answer that.