Strictly speaking, Henry Theodore Burt isn't connected into the Knibbs family other than by marriage. As it can be seen from the data, Henry's mother Ann was widowed after Henry was born, and then married Francis Knibbs.

Henry appears as Henry Knibbs in the 1841 census living in the family of Francis Knibbs. We believe that he married using his real name of Henry Theodore BURT, but then reverted from Burt to Knibbs at some time after he married and before he had children. All his children were registered as Knibbs.
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Henry, his wife Agnes and daughter Frances can be seen in 1851, living at Christchurch, Tower Hamletts, St George in the East, London, Middlesex, England:
HENRY KNIBBS 22 St George in the East, Sailmaker
AGNES KNIBBS 22 St George in the East
FRANCES KNIBBS 1 St George in the East
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In 1861, Henry is seen living at Tower Hamletts, St George In the East, London, Middlesex:
Henry T B Knibs Head Mar 32 Clerk to Sheepsmith London
Agnes Knibs Wife Mar 33 London
Agnes Knibs Daur 9 London
Henry Knibs Son 7 London
Walter Knibs Son 6 London
Edwin Knibs Son 1 London

I notice that he uses the initials T and B which are presumably Theodore and Burt.
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We can see from an article in the Times Newspaper on Wednesday Nov 10 1869, Henry was listed as a Bankrupt:

KNIBBS H.T., Queen's Road., Homerton, beerhouse manager - Nov 29 at 2.

This was from the Notice of Adjudications and First Meetings of Creditors, to Surrender at the Bankrupts' Court, London
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In 1871, he is living with his family at Homerton, Hackney, London, Middlesex:
Henry Knibbs Head Mar 43 Publican St George in East London
Ellen Knibbs Wife 43 Wapping London
Henry Knibbs Son 17 St George in East London
Walter Knibbs Son 16 St George in East London
Agnes Knibbs Dau 19 St George in East London
Edwin Knibbs Son 10 St George in East London
Alfred Knibbs Son 9 St George in East London
Ada Knibbs Dau 8 St George in East London
Sidney Knibbs Son 7 St George in East London
Herbert Knibbs Son 3 mths Hackney London
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We see this family in 1881 living at 9 Little Coran St (Beer Shop), London, Middlesex, England :
Henry KNIBBS Head M Male 52 St George East Beer Seller
Agnes KNIBBS Wife M Female 32 Wapping
Sydney KNIBBS Son U Male 17 St George East Barman
Herbert KNIBBS Son U Male 10 Homerton Scholar

I believe that the age of 32 given for Agnes is a transcription error. It should be 52.
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We can see Henry in 1891, aged 63 and a widower, living at 9 Little Coram Street, St George, London, Middlesex. The household seems a little mixed and a struggle to understand who is who.
Henry Knibbs Head Widr 63 Beerseller Somersetshire
Sydney Knibbs Son M 26 Manager St George's East
Alice Knibbs Wife M 26 Middlesex
Alice Knibbs Dau 2 Bloomsbury, London
Grace Knibbs Dau 8 Bloomsbury, London
Lizzie Knibbs Wife M 56 Middlesex
Walter Knibbs Son 9 Middlesex
Alice M Dau 6 Bloomsbury, London
Eleanor Knibbs Dau 5 Bloomsbury, London
Frank G Knibbs Son 2 Bloomsbury, London
Herbert Knibbs Son 20 Homerton

9 Little Coram Street was a beer house called the Prince of Wales, at St George, Bloomsbury, London.
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In January 1892, the Prince of Wales beer house at 9 Little Coram Street (where Henry Knibbs was landlord) was burgled and the case against John White (aged 30) and William Gibbs (aged 17) went before the Old Bailey, London's Central Criminal Court, on 8 February, 1892:

Case 279. JOHN WHITE (30) and WILLIAM GIBBS (17), Burglary in the dwelling-house of Henry Knibbs, with intent to steal therein.

GIBBS PLEADED GUILTY .

MR. ELDRIDGE Prosecuted.

GEORGE MCFADDEN (323 E). At two a.m. on 15th January I was in Tavistock Place, and saw the prisoners standing at the corner of Little Coram Street - seeing me, they moved away towards Burton Crescent - I saw them again at 2.30, at the same spot - I went round Woburn Place and Little Coram Street again, and coming to 9, Coram Street, the Prince of Wales beer-house, I noticed mud on the framework of the door, and that the fanlight was open - I pushed the door, and found it open - I heard someone inside say, "Sish! there is a Roger (meaning a policeman) outside" - I made signs for assistance; two constables came - I and Williams entered, and discovered both prisoners concealed in front of the bar - I asked them what they were doing there - they said, "We don't know" - I took White into custody, and Williams took Gibbs - I aroused the landlord - the prisoners were taken to the station and charged, and in reply, said, "Oh! all right" - a screw-driver and skeleton key were found on Gibbs.

Cross-examined by the prisoner. You did not meet me as you were coming in at the door.

WILLIAM WILLIAMS (138 E). On 15th January I was in Woburn Place about half-past two a.m., on my way home, with another constable - at Coram Street I saw McFadden flashing his light - I went up, and entered the house with him - we found the prisoners secreted behind the partition of the bar - the landlord was aroused - we took the prisoners to the station - I found on Gibbs a screw-driver and a skeleton key.

GUILTY .

WHITE then PLEADED GUILTY to a conviction of felony in October, 1889, and GIBBS to a conviction of felony in April, 1891, in the name of Tucker