Mary was born in 1776.
https://www.familysearch.org/tree/person/details/K8T4-5QV
Gender Male Christening Date 26 Jan 1800 Christening Date (Original) 26 JAN 1800 Christening Place WIGAN,LANCASHIRE,ENGLAND Birth Date 04 Jan 1800 Father's Name James Jameson Mother's Name Mary Woods
"England Births and Christenings, 1538-1975," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:J77Q-QYL : 30 December 2014, Thomas Jameson, 04 Jan 1800); citing WIGAN,LANCASHIRE,ENGLAND, index based upon data collected by the Genealogical Society of Utah, Salt Lake City; FHL microfilm 94,031.
Have you taken a DNA test? If so, login to add it. If not, see our friends at Ancestry DNA.