Blackwell (Y-DNA)

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Status summary

Completed as of April 15, 2021:

  • Recruiting direct male-line descendants of John Blackwell for SNP testing - anyone interested in submitting their DNA for testing should contact

Still to do as of April 15, 2021

  • NGS/WGS test multiple descendants of Michael Blackwell (and preferably of his son John) to place the family clade as well as test descendants to discover any subclades unique to descendants lines


First Generation

John Blackwell was born prob. Sandwich abt 1646, son of Michael Blackwell. John died bef 28 Nov 1688 (inv.) He married abt 1673 Sarah Warren and they had seven children (born Sandwich): John (1674), Michael (1676-b1709 no ch.), Desire (1678), Alice (1681), Jane (1682/3), Caleb (c1685) and Nathaniel (1686).

Second Generation

John Blackwell was born Sandwich 26 Dec 1674 and died there prob. shortly bef 6 Jan 1741. He married prob. Sandwich bef 7 May 1701 Lydia Skiffe and they had one child (born Sandwich): Lydia (1716).

Caleb Blackwell was born Sandwich abt 1685 and died Rochester 28 Nov 1762 in his 78th yr. He married prob. Dartmouth abt 1708 Bethia Taber (an mtDNA descendant of Esther MAHIEU Cooke) and they had seven children (first born Dartmouth, others Rochester): Jane (1710/1), Sarah (c1714), John (1717/8 dy), Mary (1720), Bethia (1722), Alice (1725) and Seth (1729).

Nathaniel Blackwell was born Sandwich 27 Dec 1686 and died Dartmouth abt 1758. He married twice, first abt 1711 Joanna Hathaway (a descendant of Francis Cooke) and second Dartmouth 28 May 1752 Elizabeth ____ Tripp. His children (by his first wife) were: Sarah (1712), Mary (1715), Hannah (1718/9), Joanna (1722-1724), Nathaniel (1724/5) and John (1727).

Third Generation

Seth Blackwell was born Rochester 1 Nov 1729 and likely died there. He married Ruth ____ and they had six children (Rochester): Jane (1755), Elizabeth (1760), Caleb (1764 m Elizabeth Hammond), John (1766), Seth (1768 m Susannah Bennett) and Micah (1770).

Nathaniel Blackwell was born Dartmouth 8 Jan 1724/5 and died Freetown 26 Aug 1756. He married Lydia Landers and they had at least two children: Desire (1748) and Joanna (c1755).

John Blackwell was born Dartmouth 14 Dec 1727 and died there 6 Oct 1787. He married Little Compton, RI aft 27 Oct 1748 Parthenia Shaw and they had at least Nathaniel (c1749).

DNA results J2b-Z2507

Previous Y-DNA testing

The Blackwell DNA Project Group: J2b has two individuals claiming Michael Blackwell (father of John) as their Most Distant Known Paternal Ancestor (MDKPA). Neither have done Y-SNP testing but one has done 67 Y-STR testing. FTDNA predicts they fall under the J2b Haplogroup M102. Plugging in the 67 Y-STRs into the NevGen Haplogroup Predictor Tool gives a variety of subclaces below J2b-M172>M102>Z529>Z1827>Z593>M241>L283>Z622>Z600>Z585>Z615>Z597>Z2507, but also gives a 61.4% chance of it falling under an "unsupported clade".

Further needed testing

We need additional direct male-line descendants of Michael Blackwell to WGS/NGS test to confirm and further refine the haplogroup/clade prediction for the family.

References & External Links

  • Wakefield, Robert S., Mayflower Families through Five Generations, Vol. 18 part II (daughters Mary, Annna & Elizabeth), General Society of Mayflower Descendants, Plymouth, MA, 2011
  • Brownson, Lydia B. (Phinney) and MacLean W. McLean, "Michael Blackwell of Sandwich, Mass.", New England Historical and Genealogical Register 117: