Do you have anymore info. on the Newbold Avon Knibbs please?

This is what I have put together. I found William as LEASON, a widower, on the 1861 census at ancestry and hence conjectured death dates of his wife and himself. First a listing then a family group - I haven't 'placed' William at the head of the tree:
EXTRACTS FROM K/NIBB/S DATABASE - 14 Mar 2007
E&OE
William KNIBB bef1776
= (25Apr1791) Mary PEGG bef1776
|__Elizabeth KNIB c1791 - 2Qtr1861
| = (12Oct1814) William LEESON c1786 - 4Qtr1865
|__Sarah NIBB c1795
|__James KNIBB c1799 - 1Qtr1865
= (bef1820) Mary ROBINSON c1796 - Jun1848
|__James KNIBBS c1819 - Jan1819
|__Ann NIBBS c1822
| = (16Oct1839) Thomas BUSBY c1815 - 3Feb1891
|__John KNIBBS c1823 - Nov1827
|__George KNIBBS c1826 - Mar1842
|__Samuel KNIBBS c1827 - 3Qtr1874
| = (14Dec1853) Jane WARDLE c1830 - Aug1890
| |__Sarah Jane KNIBBS 29Oct1854
| | = ( 4Qtr1881) UNKNOWN bef1865
| |__Frank KNIBBS 25May1856
| |__Jessie KNIBBS 24Mar1859
| | = ( 1Qtr1883) William BRETT c1861
| |__Charlotte KNIBBS 2Qtr1861
| | = ( 1Qtr1883) UNKNOWN bef1867
| |__Frederick KNIBBS 3Qtr1864 - 4Qtr1920
| | = UNKNOWN
| |__Eliza Annie KNIBBS 3Qtr1866 - 1Qtr1905
|__George KNIBBS c1827 - bef1832
|__Elizabeth KNIBBS c1828 - cAug1829
|__Thomas KNIBBS c1832 - a1851
|__Sarah KNIBBS 1834 - May1838
|__Deborah NIBBS c1837
|__Robert KNIBBS 4Qtr1840 - Jan1870
= ( 1Qtr1865) UNKNOWN bef1849
William KNIBB
Born bef1776
Married 25Apr1791 Newbold On Avon
Mary PEGG
Born bef1776
Children
~~~~~~~~
Elizabeth KNIB
Born c1791 Harborough (Magna?)
Baptised 15Jul1792 Newbold Avon
Died 2Qtr1861 Hinckley District - conjecture her
Buried
Occupation Charwoman Hinckley 1851 as b Arboro'
Spouse William LEESON
Sarah NIBB
Born c1795
Baptised 21Oct1795 Newbold On Avon, Warwick, England
Died
Buried
Occupation ?? m BODDINGTON and at Newbold Avon 1851 ??
James KNIBB
Born c1799 Newbold on Avon Warwicks
Baptised 22Jun1799 Newbold on Avon as NIBB
Died 1Qtr1865 Lutterworth District
Buried
Occupation Stockinger Dickson's Court 1847 as KNIBBS
Spouse Mary ROBINSON
Apprenticed Framework Knitter 1808 aged 8 to Nathaniel USHER
per Warwicks Poor Law Index
As RIBBS 1851 at ancestry Framework knitter
Alan
Alan Jackson
Host at The K/NIBB/S One Name Study website and mailing list
http://freepages.genealogy.rootsweb.com/~knibbetc/