I know this is anm old thread but I just came across this gentleman in my research as well.
https://familysearch.org/ark:/61903/1:1:SGRJ-SHG 1851 census has Juno Mark age 88, a pauper ag lab with wife Hannah age 66, Daughter Emma age 30 (Married to John Smith age 30) and son Robert age 22.
My research has a June Mark (male) married to Sarah Arnold/ Harnwell,
Marriage:
Name June Mark
Spouse's Name Sarah Harnwell
Event Date 19 Dec 1785
Event Place Wortham, Suffolk, England
with the following children
Name June Mark
Gender Male
Christening Date 24 Nov 1793
Christening Place Wortham, Suffolk, England
Birth Date 10 Jun 1793
Father's Name June Mark
Mother's Name Sarah Harnwell
Name Sarah Mark
Gender Female
Christening Date 03 Dec 1786
Christening Place Wortham, Suffolk, England
Father's Name June Mark
Mother's Name Sarah Mark
Name Mary Mark
Gender Female
Christening Date 19 Oct 1788
Christening Place Wortham, Suffolk, England
Father's Name June Mark
Mother's Name Sarah Arnold Mark
a child's death
Name June Mark
Gender Male
Burial Date 05 Jun 1794
Burial Place Wortham, Suffolk County
Age 0
Birth Date 1794
Father's Name June Mark
Mother's Name Sarah Mark
a death - maybe his mother, if his father was also June? Or he married more than one Sarah? Can't be wife Sarah Arnold/Harnwell as the kids came later than the death.
Name Sarah Mark
Gender Female
Burial Date 10 Oct 1782
Burial Place Worthams, Suffolk, England
Marital Status Married
Spouse's Name June Mark