I get messages once in a while from 23 and me informing me of the discovery of my newfound relatives. I have like 120 of them now. As more and more people get tested, my relatives also grow. I only recognize two people in this big list - my son Raghu and Navaneetha's son Ashok.
I contacted a few people through email and relationship is quite possible, for instance, the person is from Bobburkamme community, etc. But it is difficult to figure out the exact relationship unless you have really old people from families together.
This has been a source of learning, however.
I saw the following estimated DNA sharing on 23 and me.
I had heard the phrase "1st cousin once removed" but didn't know what it meant. I found the following online.
The following diagram is quite helpful
I contacted a few people through email and relationship is quite possible, for instance, the person is from Bobburkamme community, etc. But it is difficult to figure out the exact relationship unless you have really old people from families together.
This has been a source of learning, however.
I saw the following estimated DNA sharing on 23 and me.
| Relationship | Average % DNA Shared | Range |
| Identical Twin | 100% | N/A |
| Parent / Child Full Sibling | 50% | Varies by specific relationship |
| Grandparent / Grandchild Aunt / Uncle Niece / Nephew Half Sibling | 25% | Varies by specific relationship |
| 1st Cousin | 12.5% | 7.31% - 13.8% |
| 1st Cousin once removed | 6.25% | 3.3% - 8.51% |
| 2nd Cousin | 3.13% | 2.85% - 5.04% |
| 2nd Cousin once removed | 1.5% | 0.57% - 2.54% |
| 3rd Cousin | 0.78% | 0.3% - 2.0% |
| 4th Cousin | 0.20% | 0.07% - 0.5% |
First cousins share a grandparent, second cousins share a great-grandparent, third cousins share a great-great-grandparent, and so on. The degree of cousinhood ("first," "second," etc.) denotes the number of generations between two cousins and their nearest common ancestor.
The term "removed" refers to the number of generations separating the cousins themselves. So your first cousin once removed is the child (or parent) of your first cousin. Your second cousin once removed is the child (or parent) of your second cousin. And your first cousin twice removed is the grandchild (or grandparent) of your first cousin.
So, Ashok is my 1st cousin twice removed. He and I should share about 3.13% (range 2.85-5.04) DNA. However, we share 5.68% significant over the upper range. I think this implies that not only my maternal grandparents (my mother's parents) are common between us, there must be some relationship with my paternal lineage also.The following diagram is quite helpful
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