Burke’s LG of 1879, Colville of Lullington article, pp. 350-351, says a “William Colville, MA, of Baylham, Suffolk, m. Margaret Augusta, dau. of Gen Kelso and has issue.”  And the same Burke under Kelso has him, or presumably him, marrying Louisa Marianne, the other sister.

The 1914 LG, p. 414, for William of the Lullington family reports that he m. Louisa and had a son William Edward Acton born in 1844.  To be followed up in the censused and the BMD indices.
___________________

The 1841 census has this record:

Name Sex Age Birth Year Occupation Where Born

COLVILLE, William M 35 1806   Rector Suffolk
COLVILLE, Louisa F 30 1811 Suffolk
COLVILLE, Marion F 5 1836 Suffolk
COLVILLE, Emily F 3 1838 Suffolk
COLVILLE, Florence F 3 1838 Suffolk
COLVILLE, Ellen F 1 1840 Suffolk
(Plus some probable servants)

RG number: HO107 Piece: 1018 Book/Folio: 6 Page: 16    

Registration District: Bosmere & Claydon Sub District: Bramford
Enumeration District:  Ecclesiastical Parish:

Civil Parish: Baylham Municipal Borough:
Address: Rectory, Baylham
County: Suffolk
__________________

In the 1851 census, there is this enigmatic record:

Name Relation Condition Sex Age Birth Year Occupation  Disability  Where Born

COLVILLE, William Head Married M 46 1805 Rector Of Baylham  Lawshall, Suffolk
COLVILLE, Louisa Wife Married F (ABOVE 21) N K
COLVILLE, Louisa Daughter Unmarried F (UNDER 21)  Baylham, Suffolk
COLVILLE, Mary Daughter F (UNDER 21) 1830   Baylham, Suffolk
COLVILLE, Amy Daughter F (UNDER 21) 1830   Baylham, Suffolk
COLVILLE, Margaret Daughter F (UNDER 21) 1830   Baylham, Suffolk
COLVILLE, Alethea Daughter F (UNDER 21) 1830   Baylham, Suffolk
COLVILLE, William Son M (UNDER 21) 1830   Baylham, Suffolk
COLVILLE, Harriett Daughter F (UNDER 21)) Baylham, Suffolk
COLVILLE, Phillip Son M (UNDER 21) 1830   Baylham, Suffolk
TURNER, Agnes Teacher Unmarried F 21 1830 Governess  Tanington, Suffolk
OLDRING, Mary Servant Unmarried F (ABOVE 21)  House Servant  Southwold, Suffolk
HULL, Lucy Servant Unmarried F (ABOVE 21)  1830  House Servant  London
BLOWERS, Sarah Servant Unmarried  F (ABOVE 21)  1830  House Servant  Redgrave, Suffolk
BURCH, Emma Servant Unmarried F (ABOVE 21)  1830   House Servant  Baylham, Suffolk
LING, Henry Servant Unmarried M 24 1827 Groom  Baylham, Suffolk
FARMER, Caroline Servant Unmarried F (ABOVE 21)  House Servant  Lawshall. Suffolk

RG number: HO107 Piece: 1797 Folio: 341 Page: 8    

Registration District: Bosmere Sub District: Needham Market
Enumeration District: 1 & 2 Ecclesiastical Parish:

Civil Parish: Baytham Municipal Borough:
Address: Rectory, Baytham
County: Suffolk
__________________

There are no identifiable births, marriages or deaths for any of these children.

Nor can the deaths of William or his wife be found on FreeBMD for England and Wales.