Geneanet is just public trees same as Ancestry.
Suggest you wade through the trees on ancestry and try to find what it valid from where you are working from.
https://www.ancestry.com/search/collections/1030/?name=samuel_hendron&birth=1794_ireland_3250&count=50&name_x=1_pThis is presumably your one
https://www.ancestry.com/family-tree/person/tree/198240505/person/132590306572/facts Certainly some of the records match for Samuel, the death, Griffiths Valuation, Encumbered Estates.
Why didn't you state that Samuel Hendron that died 26 June 1867 in Doogary, aged 72 & married, was a Rev. a Presbyterian Clergyman, per his attached death cert? Despite the absence of church records the Presbyterian Historical Society has a Fasti of ministers
https://presbyterianhistoryireland.com/web-resources/minister-lists-fasti/ there is also History of congregations of the Presbyterian Church in Ireland and biographical notices of eminent Presbyterian ministers and laymen
https://archive.org/details/historyofcongreg00kill though I got no result for a search for Hendren/on within (Middletown church is not included).
Also explains why he moved.
You won't make progress before Samuel if his father was a Farmer though, for any research in the mid 1700's you have to he delving hands on into original Estate Records in the archives themselves. You & the trees seem to have gathered up all the online stuff.
Son David Charles Hendren's death cert says his mother was Anne McCullagh. Baptised 2nd Markethill 1 June 1827 the snip in the trees is from their website
https://markethillpresbyterian.co.uk/genealogy/ and she seems to have come came from a line of Presbyterian ministers.
The Geneanet mentiones a source being a Markethill history published 1981 so not online.
PRONI guide indicates P. 1st Markethill: Baptisms, 1843-89; marriages, 1845-1936.
P. 2nd Markethill: Baptisms, 1821-1926; marriages, 1821-1924.
Check or subscribe/join
https://presbyterianhistoryireland.com/https://markethillpresbyterian.co.uk/history/The Places > Churches section of
https://www.bygonesandbyways.com/mainmenu.htm also mentions the known ministers.