I only see a death for a later one in Marleybone so will stick to the older one for the moment!
Either of these might be his parents in 1851
Crymball, Eyton ( Eyton is close to Ruabon and Erbistock)
HO107/2502/465/9
Robert Pemberton, 66. farmer of 12 acres, b. Codington, Cheshire
Elizabeth, wife,56, laundress, b. Ruabon
Hanna Griffiths, 18 house servant, b. Erbistock
Jane Roden, 16 -do-, b. -do-
or
Rhyddallt, Ruabon
HO107/2503/44/6
John Pemberton, 63, farm bailiff, b. Codington, Cheshire
Mary, 53, b. Ruabon
Thomas, s, 25, sawyer
Catherine, d, 23, dress maker
John, s, 20, smith
George, s, 14, ag lab.
All children born Erbistock
There may be others but can't see any other likely ones on a first go around.
There seem to be a pocket of Pembertons b. Coddington.
gnu
added (12.19pm) - from the 1871 census RG10/5652/25/12 , his first son looks as if it was John so the second one looks the more likely. In 1861, a brother, Thomas, 35, was living with him so i think that the John and mary look correct.