Does 866 cM shared suggest half aunt rather than aunt?

How much DNA would you share with a half aunt?

Average Percent DNA Shared Between Relatives

Relationship Average % DNA Shared
Full Sibling 50%
Grandparent / Grandchild Aunt / Uncle Niece / Nephew Half Sibling 25%
1st Cousin Great-grandparent Great-grandchild Great-Uncle / Aunt Great Nephew / Niece 12.5%
1st Cousin once removed Half first cousin 6.25%

How many centimorgans do aunt and niece share?

23andMe

Relationship Range in percentages Range in centiMorgans
Parent / child 50% ~3719 CM
Father / son (no X sharing) 47.54% ~3536 cM
Full sibling 38% – 61% 2826 – 4537 cM
Grandparent / grandchild; Aunt / uncle; Niece / nephew; Half siblings 17% – 34% 1264 – 2529 cM

How many cM would a half uncle share?

According to the relationship chart from Blaine Bettinger’s Shared cM Project (2017), the 99% range found for a half aunt/uncle was 500-1446 cM.

How many centimorgans do half first cousins share?

The amount of DNA shared with a half-first cousin falls between 215-650 cMs (centimorgans). Any amount less than 515 cMs signifies an almost certain half-first cousin relationship, since the DNA shared between two full-first cousins should fall between 515-1300 cMs, approximately.

How does a half aunt show up on AncestryDNA?

Half-siblings, generally speaking, will show up in the “Close Family” category on Ancestry DNA. It is also possible for half-siblings to be placed in the “first cousin” category, since the categorization of our matches is based on the amount of shared DNA.

How can someone be your half aunt?

A half-aunt is a half-sister of a parent. An aunt-in-law is the aunt of one’s spouse. An aunt-in-law can also be an aunt by marriage (female spouse of a relative). A great-aunt/grandaunt (sometimes written grand-aunt) is the sister of one’s grandparent.

How much DNA do aunts share?

How much DNA do you share with your aunt or uncle? A person will share between 1300 and 2300 centimorgans with their full aunt or uncle. Measured in percentages, we expect that an individual will share approximately between 19-33% of their DNA with these relatives.

How many shared centimorgans is significant?

For example, you’ll usually share about 120 centimorgans with a 3rd cousin, but it’s possible to share as few as 90 or as many as 200.



What does the match confidence score mean?

Approximate amount of shared DNA (in centimorgans) Possible relationship
200—620 2nd cousin
90—180 3rd cousin
20—85 4th cousin
6—20 Distant cousin: 5th cousin — 8th cousins

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