initial research by Marylou Harris Wilkinson, descendant of JM Jones
could not read or write per 1880FCI
last name Saunders(Sanders) from son Jonathan’s BC AND son Jacob’s Pa DC

1841UKC John Morris Jones &Family; Wales Census > Glamorgan > Gelli gaer > District 8, image 4 of 7 @ancestry.com, Civil parish: Gelli gaer; Hundred: Caerphilly; County/Island: Glamorgan; Country: Wales
Source information: HO107/1414/8; Registration district: Merthyr Tydfil; Sub-registration district: Gelligaer; ED, institution, or vessel: 8; Folio: 19; Page: 8; Line number: 20; GSU Number:
464326
Household:
John Jones b abt 1811* in Glamorgan, Wales
Gwenllian Jones b abt 1811* (outside of county)
John Jones b abt 1833 in Glamorgan, Wales
Edward Jones b abt 1836 in Glamorgan, Wales
Thomas Jones b abt 1837 in Glamorgan, Wales
David Jones b abt 1840 in Glamorgan, Wales
*For the 1841 census ages were rounded down to the nearest factor of 5 (15, 20, 25) and are not exact.

1851UKC John M Jones & Family; Wales Census > Glamorgan > Eglwysilan > District 4b; image 1 of 51 @ancestry.com; Source information: HO107/2454; Registration district: Cardiff; Sub-registration district: Caerphilly; ED, institution, or vessel: 4b; Folio: 101; Page: 1; Household schedule number: 1; GSU Number:104195
John Jones b abt 1808 in Merthyr Tyded, Glamorgan, Wales, Head
Gwenllian Jones b abt 1808 in Bedwellty, Monmouthshire, Wales, Wife
John Jones b abt 1833 in Gellggan, Glamorgan, Wales, Son
Edward Jones b abt 1835 in Gellggan, Glamorgan, Wales, Son
Thomas Jones b abt 1837 in Gellggan, Glamorgan, Wales, Son
David Jones b abt 1839 in Gellggan, Glamorgan, Wales, Son
Jonathan Jones b abt 1841in Lanvabon, Glamorgan, Wales, Son
James Jones b abt 1844 in Lanvabon, Glamorgan, Wales, Son
Henry Smith Jones b abt 1844 in Eglwysilan, Glamorgan, Wales, Son
Jacob Jones b abt 1847 in Bedwellty, Monmouthshire, Wales, Son
Margret Jones b abt 1851in Mynyddislwyn, Monmouthshire, Wales, Daughter
Ann Hannan b abt 1839 in Monmouthshire, Wales, Niece

1861UKC John M Jones & Family; Wales Census > Glamorgan > Aberdare > District 36; image 11-12 of 65 @ancestry.com; Source information: RG9/4070; Registration district: Merthyr Tydfil; Sub-registration district: Aberdare; ED, institution, or vessel: 36; Folio: 100; Page: 11; Household schedule number: 57; GSU Number: 543229
John Jones b 1810 in Glamorgan, Wales; Head
Gwenllian Jones b 1811 in Monmouthshire, Wales, Wife
David Jones b 1840 in Glamorgan, Wales, Son
Jonathan Jones b 1843 in Glamorgan, Wales, Son
Henry Jones b 1847 in Glamorgan, Wales, Son
Jacob Jones b 1847 in Glamorgan, Wales, Son
Margaret Jones b 1851in Glamorgan, Wales, Daughter

1870FCI John(Morris)Jones&fam; Pennsylvania > Luzerne > Lackawanna; Post Office Hyde Park; image 49 of 130 @ancestry.com; Source Citation: Year: 1870 Census Place: Lackawanna, Luzerne, Pennsylvania; Roll: M593_1366; Page: 150; Image: 301.
John Jones; born abt 1810 in Wales
Gwentteor Jones; born abt 1810 in Wales
Henry Jones; born abt 1844 in Wales?? date could be James?
Margrett Jones; born abt 1851in Wales

1880FCI John M Jones & fam; Lackawanna, Lackawanna, Penn., fam hist library film 1255138, film # T9-1138, pg 381B; Pennsylvania > Lackawanna > North East Election District Lackawanna > District 44; image 38 of 60 @ ancestry.com; Source Citation: Year: 1880; Census Place: Lackawanna, Lackawanna, Pennsylvania; Roll: 1138; Family History Film: 1255138; Page: 381B; Enumeration District: 44; Image: 0384.