dates are guessed taken from marriage dates and age of her child
"England Marriages, 1538–1973 ," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:N66Y-Z5X : 10 February 2018), Henry Job Homans and Sarah Underdown, 18 Apr 1819; citing Lambeth, Surrey, England, reference item 1 p 234, index based upon data collected by the Genealogical Society of Utah, Salt Lake City; FHL microfilm 1,041,641.
Have you taken a DNA test? If so, login to add it. If not, see our friends at Ancestry DNA.