I'm descended from Rachael Ann Dinning via her relationship with John Walker.
Rachael & George Leadbeater have a baby son, Noah, in 1836 while living in Bilston which was George's home town. Yet by 1841 George and Noah are living with his parents and no sign of Racheal.
She is on the 1841 census in Walsall, listed as Rachael Walker and with a 4 month old baby Eliza Walker. From 1841 - 1857 she is with John Walker and they have 7 children together. I have never been able to trace a marriage and suspect that there is none. John dies in 1857 and Rachael marries again in 1858. I have documents (her 1858 marriage certificate listing father, children's birth certificates etc) to show that this is the same Rachael Ann Dinning. In addition George remarries in 1859.
In terms of Strong I have been unable to get any further back. He is listed in the Flax growers list of 1796 at Tynan in Armargh and emigrates to England in 1809.
Dinning / Denning / Clendinning / Clendenon etc are likely derivatives of Glendinning, a sept of the Douglas Clan and originating from Dumfries / Roxburghshire (cf around Langholm) in Scotland. Presumably a branch came to Tyrone / Ireland as part of the Plantation of Ulster in the 17th C. There is an Adam Clendenon listed in the 1766 Religious Census of County Tyrone living in the Parishes of Aghalow or Carnteel. Presumably a relation but with no known parish records for Caledon Bridge (Strong's aleged birthplace) for the correct period it cannot be proved.