Do We Descend from All of Our Ancestors? Apparently, Not!

One of my favorite YouTubers is Jarret Ross, the GeneaVlogger. In his series "Professional Genealogist Reacts," he reviews videos on genealogy, often focusing on DNA-related topics.

In a recent episode, he discusses Marcus Gallo's video "You Don't Descend from All of Your Ancestors." The key point is that we are not genetically related to most of our ancestors, especially those many generations back. Although we inherit a limited number of unique genes, we have an exponentially vast number of ancestors. For example, if you go back 15 generations, you have 32,768 ancestors, but only 1,112 DNA segments to distribute among them. This means that only about 3% of those ancestors contribute to your DNA at that generation. As Gallo explains, with each generation, the number of DNA segments increases arithmetically, while the number of ancestors increases exponentially.

(Side note: My rule of thumb is that with every 10 generations, the number of ancestors multiplies by over 1,000. For instance, the 10th generation has over 1,000 ancestors, the 20th generation has over a million, the 30th generation has over a billion, and by the 40th generation, you have over a trillion ancestors! To put this in perspective, my potential ancestor Charlemagne, born in A.D. 748, is about 40 generations back. He would be one of about a trillion ancestors in that generation. Of course, there weren't actually a trillion people living back then, so pedigree collapse definitely played a role.)

In the video, Jarret Ross not only highlights Gallo's insights but also adds his own analysis. Both vloggers explore essential concepts like Y-DNA, mt-DNA, and pedigree collapse. Jarret also recommends several websites and tools for conducting in-depth DNA research.

It's an excellent video. You should check it out!

Zuni Pueblo Ancestor: Josefa de Hinojos, wife of Diego Montoya

Certain words and phrases in this article have links to articles and a video on the Internet. Click on the underlined words to review these site.

Josefa de Hinojos is a common ancestor of many New Mexicans. She was the wife of Diego Montoya, and had at least seven children. My research shows that I descend from her at least 22 times, with all four of my grandparents being descendants. 

In the prenuptial investigation of her descendants, Josefa de Hinojos is alleged to be a coyota of the Zuni people. A "coyota" was a woman of mixed Spanish and Native American ancestry. She is also noted to be the sister of and Indian named Ventura.1.

DNA tests analyzed by the New Mexico Genealogical Society DNA Project Team has identified five Josefa de Hinojos's matrilineal descendants as being in the mtDNA Haplogroup C1b11, a Native American haplogroup. Researcher Miguel A. Torrez wrote that DNA research technology is not able to identify which specific tribe their ancestor is from. 2. 

New Mexican Hispanics will find that they most undoubtably have Native American Ancestry. When the Spanish conquered Mexico, they paired off with and had children with Native American women. Their descendants of mixed race came to New Mexico and mingled with various Pueblo tribes here. Captured native children, known as genizaros - sold to and raised by Spanish families - were freed and blended in with the growing mestizo population of New Mexico.

My ancestry includes all of these people. The paper trail frequently lists my forebears as  "mestizo", "indio" and "genizaro". My DNA results show from 18% (FamilyTreeDNA) to 23% (Ancestry.com) indigenous American blood. When I began understanding the true nature of my ancestry decades ago, I began celebrating the diversity of my family. This fact is not unique to me. The only uniqueness of my ancestry is that only my sisters and I have the specific combination of our pedigree. However, all Nuevo Mexicanos can tell this mestizo story.

In his presentation "Nuevomejicano Ancestors with Spanish & Indian Antecedants", Jose Antonio Esquibel profiles Josefa de Hinojos. I linked the video at the 8 minute, 46 second mark when he begins talking about Josefa. However, I suggest you rewind the video to the beginning. Earlier in the video, Esquibel explains how our mestizo ancestors helped negotiate with their Indian cousins to end the 17th Century Pueblo Revolt and allow the Spaniards to occupy New Mexico once again. There were definite close familial bonds between the Spanish and Pueblo residents of the Kingdom. 

Endnotes:

1. Fray Angelico Chavez, New Mexico Roots, Ltd.: A Demographic Perspective from genealogical, historical and geographic data found in the Diligencias Matrimoniales or Pre-Nuptial Investigations (1678-1869) of the Archives of the Archdiocese of Santa Fe. (Santa Fe, New Mexico: typescript, 1982), volume 2, p. 316. Prenuptial Investigation of Jose Vicente Duran y Chaves and Maria Concepcion Aragon.

2. Daria Celeste Landress, Henrietta Martinez Christmas, and Miguel A. Torrez, "Josefa de Hinojos: Colonial-period matriarch of New Mexico and Haplogroup C1b11," New Mexico Genealogist, 60 (March 2021): pp. 30-42.