Thursday, April 13, 2017

K is for Kinship

Part of doing my DNA was to find my "Kin" as they say in the south. I find is interesting how we are related, even if it is way down the line - My sons, don't get it. "What difference does it make? They can't really be relatives?" they say to me all the time. Obviously, they are not yet able to appreciate our ancestors. For them, if you ain't a first cousin, then fuggedaboutit.

Kinship degrees can be confusing! I found this on

~ ~ ~

Q: Patrick married Elizabeth. Patrick's sister Johanna married Elizabeth's brother, John. Their children were double first cousins. What does that do to the generations that follow? Does that change their level of kinship?  It is certainly a stronger blood tie than if the cousins weren't descended from the same two families.

A: Kinship is often one of the most confusing aspects of our genealogical research. We are often trying to figure out how we are related to a fellow researchers. We are sure they are a cousin, but determining that relationship is sometimes difficult to pin down exactly, especially if you are new to researching your family tree.  Most of the time questions deal the word "removed" and what is a second cousin. However, there are a number of other relationships including double first cousins and others.

Double Cousins
A double cousinship occurs only when a set of siblings marries another set of siblings and both have children. This could be two sisters marrying two brothers. In your case, this is a brother and sister marrying a sister and brother.

Double cousins actually share the same gene pool as siblings. They share all four of the same grandparents. Most cousins share only one set of grandparents.

Cross and Parallel Cousins

First cousins can also be cross cousins. Cross cousins are those cousins who descend from a brother and sister. In your case, it was two sets of siblings, but they were still cross cousins.
There is another type of cousinship that is possible with first cousins. When the siblings are the same, as in two brothers or two sisters, the offspring, in addition to being first cousins, are also known as parallel cousins.

Affecting Further Generations

While double first cousins are double because they share both sets of grandparents, that is generally where such special references end. As you get to second cousins on down, the tree for proving this shows descent from a single individual. While these individuals would obviously be second cousins on many lines, that is where the special circumstance ends.

 I have not found any double first cousins, yet.  Have you? 

Cyndi's List - Cousins and Kinships Database

Subscribe to Rooted by Blood, DNA and a lot of BS by Email


  1. I hadn't heard of double cousins before. Interesting. Can't get my head around cross and parallel cousins though...I must be missing something.

  2. I never thought of the term double cousins but they would be but I started getting confused the more I read here...hahahahaaa. For some reason, I think I came across this in my tree but can't remember. I know my first cousin married his first cousin. My Uncle.s son married his mother's niece on her side. I always thought that was a bit icky.

  3. My husband is an identical twin and we have fraternal twins so we always watching/reading specials on twins. If identical twins marry identical twins . . .instead of being cousins, they would be almost siblings!!


About Me

My photo
Stay at home Mom to 1 dog and 2 cats. I am the "big sister" in the photo. My baby sister, passed away unexpectedly, Sept. 2015 at the young age of 56. I miss her terribly. Everyone in my childhood family has now passed. I have 3 sons. My oldest son died in 2003 at the age of 25. I am not LDS. I do enjoy History and GENEALOGY has become my hobby and my passion.