Before I start on the Samuel Relph side of things there are a couple of other points that may be worth looking at.
You said in your last message that when the remainder of John Relph's family arrived a year later Hannah was only listed on the manifest as being 5 months old. I believe that this was the daughter of Catherine who had been Christened in Lazonby on the 24 Feb 1833. No father is mentioned in the IGI and I could find no marriage listed anywhere so I can only assume that the child was born out of wedlock.
The following is an extract from the notes I have for Thomas on my family tree, which I wrote several years ago when I was doing the research on the family
"Carlisle archive office:- Film No. JAC 1122, Reference:- P/R 100/4 (Lazonby Baptisms and Burials 1796-1812) refers to the Christening of Margaret and Catherine and their mother as being Mary Relph (Late Noble).
Several of the childrens Christenings were found in Carlisle archive office:- Film No. JAC 1122, Reference:- P/R 100/5 (Lazonby Baptisms1813-1856)".
Other than the information you have I can add very little to the children of Thomas and Mary except that John b. 1810 may have married Jane A Parker in Philadelphia on the 7 Feb 1837 and died in Bellefonte, Centre abt 1855. That piece of information was found on another family tree.
Samuel Relph 1786 Married Ann ?????? abt 1812 they both died on the farm they had in the same year. He died 25 March 1858 and she died 28 July 1858. The farm was called Fog Close in Kirkoswald and they can be found on the 1851 census. They had the following five children; Thomas 4 February 1813 Joseph 1 May 1814 John 22 September 1815 Jane abt 1825 d. 26 July 1844 Mary Ann abt 1835
I'll have to send this now as I have to go elsewhere. Would you mind in the future if we used e-mail addresses for corresponding that way I can write the information, depending on the time I have, then save it in draft which I can't do here. My address firstname.lastname@example.org