Here is the 1851 census
Enoch Ibbs, head, age 22, potter (then after it is says taken off!) born Longton
Mary Ibbs, wife, age 21 born Longton
William Ibbs, age 1 week born Longton
Thomas Brough, father in law, widower, age 80, potter handle maker born Longton
John Barker, lodger, married, age 63, labourer born Longton
White Row
Longton
HO 107 2007
folio 223 page 38
the father in laws name is definitely Thomas.
Hope this helps
Nicky