2. Immigration of Irish Quakers to PA 1682-1750 by Albert Cook Myers 1902 p. 119
3. PA Mag. Vol XXI p. 506-7
4. Main Archive Record
Swarthmore College; Swarthmore, Pennsylvania; Births and Deaths, 1686-1739; Collection: Philadelphia Yearly Meeting Minutes; Call Number: MR-Ph 267 (marriage record with Rose Dixon with clear marriage date 01 1st 1690 (1 Mar 1690). See attached PDF.
It may be possible to confirm family relationships with Thomas by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share DNA with Thomas:
Perhaps a note I made during my own research will help with the confusion: This Thomas Pierson should not be confused with the Thomas Pearson born the same year in Pownall Fee, Cheshire. See Mendenhall.org and rea-williams.com for this Thomas Pierson b 1653 d 1722 who had only two wives: Rachel Sharpley and Rose Dixon. Thomas Pearson 1653-1734 was married to Margery Ellen Smith. Confusing matters is that they both lived in Chester County, Pennsylvania at one time but the records appear to be of two different individuals of different families and occupations when various wills, birth, marriage and death records are examined. Some WikieTree records also have these two different families confused--the dates in some of those lineages do not work.