Completed as of March 28, 2021:
- Recruiting direct male-line descendants of Joseph Jenkins for NGS/WGS testing - anyone interested in submitting their DNA for testing should contact Raymond T. Wing (email: wing.genealogist AT gmail DOT com)
Joseph Jenkins was born Barnstable the "last of" Mar 1669 and died there 13 Oct 1734. He married Barnstable Oct 1694 Lydia Howland (daughter of Joseph Howland) and they had nine children (born Barnstable): Abigail (1695), Bathsheba (1696), Ann (1701), Joseph (1703), Lydia (1705), Benjamin (1707), Reliance (1709), Prudence and Hannah.
Joseph Jenkins (II) was born Barnstable 29 Feb 1703 and died there 16 Jan 1749. He married Barnstable 15 Jul 1736 Mercy Howland (daughter of [[Howland (Y-DNA)#Third Generation|Shubael Howland)) and they had six children (born Barnstable): Mercy (1737), Joseph (1739 m Remember Stuard, Bethiah Bursley & Hannah Foster), Bathsheba (1741), Mary (1742), Abigail (1745) and Zaccheus (1748 m Sarah Hinckley & Olive Conant).
Benjamin Jenkins was born Barnstable 30 Jun 1707 and died Barre 1 Jun 1787. He married Barnstable 29 Oct 1730 Mehitable Blish and they had ten children (born Barnstable): Ann (1731), Hannah (1733/4), Lydia (1735), Mehitable (1737), Benjamin (1740 m Hannah ____), Southworth (1742 m Huldah Wright), Timothy (1744 m Mary Cunningham & Abigail Perry), Bethiah (1747), Sarah (1750) and Abigail (1753).
DNA results R1a-S6842
The  Group: Unm_R and the  Group: XX - Cooke, Francis YDNA/FF Tests document one individual claiming their Most Distant Known Paternal Ancestor (MDKPA) was John Jenkins (father of Joseph). This individual has apparently taken a Big Y test and has been assigned to the following haplogroup: R1a-M417>PF6162>Z283>Z282>Y2395>Z289>Z284>S4458>S5301>S6842
NGS/WGS testing of additional Y-DNA descendants of Joseph Jenkins would likely further refine this haplogroup and possibly create subclades for different branches of the family.
Lainhart, Ann Smith and Robert S. Wakefield, Mayflower Families Through Five Generations: Vol. 23 (Howland) Part 1 (First 4 generations of some children), General Society of Mayflower Descendants, Plymouth, MA 2006