Ambrose R. Davenport was born in Virginia in 1771. He joined the army under General (Mad Anthony) Wayne and arrived in Mackinaw, Michigan in 1796. He married Elizabeth and they had six (?) children - Ambrose, William, Henry, Nancy, Caroline, and Susan. In 1812 after the British took over Fort Michilimackinac, Ambrose was deported to Detroit for refusing to renounce his American citizenship. Ambrose returned to Mackinaw in 1815 where he remained until he died in 1858. His many descendents settled in Mackinaw, Wisconsin, and Illinois. Known as the Mackinaw Davenports.


Listed below are some of websites dedicated to the Mackinaw Davenports.  Each represents the complete line or information about its progenitor. If you know of additional websites that might fit this same criteria - please contact the administrator at info "at"

The Yankee Rebel Tavern
A good place to start any Davenport research is Nevada Jack's Davenport Directory and Davenport site. It contains lists of hundreds of Davenport researchers and their interests.


Mackinaw Branches

The following are the known male branches of the Mackinaw line. For our purposes a branch would begin with the sons of the 1st generation. If there was only one son then we would start with the sons in the 2nd generation and so on. We would like to test at lease one individual from each branch. The red highlighted entries are branches for which we do not have test participants. Of course we will accept any Davenport participants but especially need the non-highlighted branches. 

If there are additional branches not listed or other changes need to be made - contact info "at"

1st Generation 2nd Generation 3rd Generation 4th Generation Notes Kit #
Ambrose 1771-1858 Ambrose 1801-1879 Henry L. 1828-1912 George G. 1873-1910 8862
Ambrose 1771-1858 William 1803-1875
Ambrose 1771-1858 Henry 1805-1847


 Y-DNA Test Results


The descendents of Ambrose Davenport  belong to Haplogroup R-U152
Click here to download an Excel file of these Y-DNA results

These are the Y-DNA results to-date of the participants descended from Ambrose Davenport. The different row colors represent the separate branches of the line.  Click on the Kit # to view more information about the individual Davenport linage.  Newer results have a purple block to the left of the kit number. The Modal haplotype is what we believe the Y-DNA of Ambrose looked like based on current results.  Red and blue cells show where an individual varies from the modal. Red indicates movement upward, while blue downward. Combined pink cells represent "connected" markers where the actual difference is counted as one.


 Kit #  /19 ab   1 2 ab      abcd6H4iiaiib    ab    S1aS1b    S1  ab                 Kit #
 Modal1324141011151212121313291891011112615182915151517                                          Modal
 88621324141011151212121313291891011112715182915151517                                          8862
  The participant below matches the Mackinac Island Davenports but no link has been found yet.
 74471324141011151212121413301891011112615182915151516                                          7447
  The participants below match the Mackinac Island Davenports. They reside in England and the first participant descends from from Chorley branch of the Cheshire Davenports. Their results are also displayed on the English page.
 1865541324141011151212121313291891011112615182915151617111119231615201936371212                              186554
 3738171324141011151212121313291791011112615183015151617111119231615202036371212                              373817
.   /19 ab   1 2 ab      abcd6H4iiaiib    ab    S1aS1b    S1  ab                  


The following people are participating in the Davenport Surname DNA Project.  You may view more detail for some by clicking on the link in the Ancestor column.   To email the participant, use the kit # followed by @ and then 

Kit #


Current Residence

Earliest Known Ancestor plus more

8862 Donald F Davenport Jr Michigan

Mackinac Island Michigan Davenports. Ambrose Davenport (1771-1858) > Ambrose > Henry L > William George > Harold Lawrence (1904-1973).

7447 William Byron Davenport California William Davenport of Troy, NY (b. 1839 in Ireland) > Byron L. > William J. (b. 1900 in California)
 186554 David John Davenport  England  A Chorley Davenport.  Henry (1607-1664) > Henry (1644-1698 > Henry (1677-1731) > Sharrington (1704-1774) > Edward (1744-1812) > Edmund Sharington (1778-1842) > William S. (1808-1871) > Vivian (1843-1916) > Vivian Hugh (1876-1951) [Note: This participant is also listed on the English page.]

Roger Davenport


James Davenport (1680-?) > Saunders (1720-1778) > Saunders (1748-?) > Philip Saunders (1779-1850) > Philip Saunders (1815-1898) > Benjamin Stocks (1848-1902) > Hebert (1879-1958) > Jack (1911-2009).  This line primarily based in London.



 Other Surnames


In most cases when any of our Davenport results have had a high resolution (37 or 67 marker) match - it was with another Davenport. However, there have been a few other surnames that came very close to the Davenports. For our purposes, very close means they match on 33 out of 37 markers or better, or 62 out of 67 or better. The surnames listed below are those that are very close to this Davenport line on the 37 or 67 marker test.
This does not necessarily infer that they had a common ancestor. But it may be worth looking into the possibility. The first step is to determine if the ancestors lived in the same vicinity at the same time. When viewing the "prospects" - give the 67/67 a higher priority, then 66/67, and 65/67, and so on.
Surname67 MarkersSurname37 Markers