If you look back to the post with the 1851 census, Andyaj77 is descended from William and sgillibrand's husband from Reuben, which would make them cousins.
William's branch is given in the posts above.
As for Samuel, his full name was Samuel Wood Gillibrand, born to Reuben Gillibrand and his wife, Ann(e), 11-1-1846 and baptised St Michael's Ashton-under-Lyne 22-3-1846.
Samuel married Hannah Hague. The marriage was registered in Ashton in the March quarter 1868.
The 1871 census shows the family at 116 Grasscroft Street, Dukinfield:
Samuel Gillibrand, 25, cotton weaver, b. Dukinfield
Hannah Gillibrand, 25, cotton weaver, b. Ashton-u-L
Elizabeth A. Gillibrand, 2, b. Stalybridge
Reuben, 4 months, b. Stalybridge
Elizabeth Haigh, mother-in-law, widow, 60, housekeeper, b. Aston-u-L
The 1881 census shows the family at 120 Grasscroft Street, Dukinfield:
Samuel Gillibrand, 35, cotton loom overlooker, b. Dukinfield
Hannah Gillibrand, 35, b. Ashton
Elizabeth A., 12, scholar, b. Stalybridge
Reuben Gillibrand, 10, scholar, b. Stalybridge
Mary [I/J] Gillibrand, 7, scholar, b. Stalybridge
Thomas, 5, scholar, b. Stalybridge
Martha H., 2 months, b. Stalybridge
The 1891 census shows the family at 111 Grasscroft Street, Stalybridge:
Samuel Gillibrand, 45, cotton weaver, b. Dukinfield
Hannah, 45, cotton weaver, b. Hartshead
Reuben, 20, sawyer, b. Stalybridge
Thomas, 15, blacksmith's apprentice, b. Stalybridge
Annie, 7, scholar, b. Stalybridge
The 1901 census for 1 Bond Street, Stalybridge, shows Samuel and Hannah's son, Reuben, as a widower:
Reuben Gillibrand, widower, 30, wood sawyer, b. Stalybridge
Samuel, son, 6, b. Stalybridge
George Hirst, brother-in-law, single, 24, quarryman, b. Stalybridge
The 1911 census shows 1911 census information removed