OK, lets start from the beginning.
You have a Thomas Wilcock, b.c. 1799, Silsden
he married a Zilah Shackleton in Bingley in 1832.
He was living at Morton Banks for a period of time.
Nearby at Morton Banks is another family.
That being a John and Ann Wilcock. John was born circa 1779, Kildwick (or Silsden?) Ann, his wife, was born in 1779 at Keighley.
They could be John Wilcock and Ann Booth, who married at Kildwick church in
1798. John Wilcock, a bachelor of Silsden, weaver, to Ann Booth, a minor on the 26th Nov 1798.
Now lets just follow their family for a bit . . .
Children - baptised at Kildwick church.
1. Thomas, first son of John, a weaver of Silsden and Ann Booth, b. 1899
2. Jane, 1st dau of John , weaver of Silsden and Ann Booth, b. 26th April 1802, and bp. 1st June 1802.
3. William, son of John and Anne of Morton Banks, a weaver, no birth, baptised on the 22/8/1813.
Now this Thomas fits in nicely to the family group and we see that this family moved from Silsden to Morton Banks some time between 1802 and 1813.
We know that your Thomas also moved from Silsden and was in Mortan Banks based on the census and that he married in Bingley in 1832.
I haven't had any luck finding info on the other family members who are with the John and Ann in the 1841 census ie Christiana.
Did find an interesting burial at Kildwick church, but not sure where he fits in just yet.
Burial of John Wilcock, of 4 Barley Cote, Morton Banks on the 19/12/1931, age 86 years. This gives this Johns birthdate approx. 1845.
Anyway, until something else turns up I am not sure what else I can give you.
The marriage of Thomas to Zilah and Bingley is the best option but fathers name isn't always given in parish registes.

Hope this helps and if you have another query please just ask. It is all at my finger tips.

Margaret