If your great-great grandfathers were siblings, you would have shared a great-great-great grandfather and would be fourth cousins. You must deal with "removed" relatives if you are not in the same generation. For example, if your grandparent's generation had three children, who were then married to non-relatives, you would have two parents who were first cousins and one parent who was second cousins.
If your great-great grandfathers were not siblings, you are third or fourth cousins with each other because they were both remarried before they died. You also have first cousins once removed if their marriages were to different people (first cousins) who were both alive when they wrote their wills leaving everything to different families. If so, then the original brothers or sisters were from the same family and the first cousins were also from the same family.
There are many more types of relationships than just first cousin twice removed. You should search the Internet for additional information about your family history. Websites such as Ancestry.com and FamilySearch.org can help you find relevant records regarding your ancestors.
Knowing the relationship between you and your cousins will help you understand why some records do not apply to your situation.
You are second cousins if you share the same great-grandparents. You are third cousins if you share the same great-great-grandparents, and so on. If your grandparents are someone else's great-grandparents, you are first cousins once removed since you are separated by a generation. Third cousins may not always know each other, but they would still be related.
Cousins are people who share the same blood relative. First cousins are siblings of a parent or grandparent; second cousins are siblings of a sibling; and third/removed cousins are people who aren't related at all but live in the same household. Grandparents usually have several grandchildren due to adoption, so their family tree is full of branches and leaves. Each branch represents one grandchild and any number of branches can grow from one root node (i.e., grandfather).
It is very common for there to be more than one person who shares the same blood relative. For example, if I had three children, two of them would be first cousins because we shared the same mother but different fathers. The third child wouldn't be a cousin of either of the others since he had different parents. In general, if you have n children then you will have 1/n^th of the population that is truly unrelated to you. This percentage gets smaller as you have more children because it is easy to accidentally include or exclude certain individuals when choosing who will be parents of your future children.
2. Your grandparents' siblings are your granduncle or grandaunt, not their great uncle or great aunt. Similarly, the siblings of your great-grandparents are your great-granduncle or great-grandaunt. Cousins are people who are related through a sibling of one of your ancestors. So, yes, you are related.
3. You are not related to your cousins because your ancestor and theirs had a shared parent. You are related to your cousins because they are all children of your third cousin once removed. It may help to think of them as being on a family tree that shares a common branch, but not a common root.
4. Yes, you are related to your cousins. They are descendants of your ancestral brother or sister, just as you are. Although they cannot be descendants of your father or mother, they are still relatives - ancestors who were siblings.
5. You are not really related to your cousins. They are descendants of your shared ancestor's brother or sister, so they are cousins. However, they are not relatives of yours because your ancestor did not have a sibling. Rather, they are relatives of your ancestor because they are both children of their third cousin once removed.
6. Yes, you are related to your cousins.
According to this chart, your second cousin once removed is your grand-great-grandchild. Uncle's Your grandfather's brother is your grandfather's grandson, and you are his grandson (or niece). Any of their offspring (excluding inter-family marriages, which might complicate matters) are first cousins to one other. You are the son or daughter of one of these cousins. There are about 8 million first cousins in the United States.
In other words, you have a 50% chance of being related to any given first cousin. Because there are about 8 million first cousins in the United States, you would expect them all to be born within about 200 miles of each other to avoid marrying strangers. Actually, because people move around so much, this number will usually be lower than that. But because relationships are not always recognized by law, even children living in different states or countries could still be first cousins. For example, if the parents of a young man from North Carolina marry siblings who were both born in South Carolina, they would be considered cousins because they share a parent who is also their sibling. This means that even though they live more than 100 miles away from one another, there is a good chance that they would be related.
There are several ways that these relatives can be connected to you. If you have family members who live in the South Carolina area, then they could be first cousins twice removed, meaning they are both descendants of your great-grandparent John Smith.
First cousins have a shared ancestor. Second cousins have a great-grandparent in common. Third cousins have a great-great-grandparent in common (the grandparent of a grandparent). Fourth cousins have a great-great-great-grandparent in common (the grandparent of a great-grandparent). And so on.
Because they share a double-great-grandparent, first cousins are twice as likely to be born within one year of each other as they are to be born five years apart. Also, because they share a double-great-grandparent, first cousins are more closely related than second cousins who don't share any other family members. There are 7,291,566 first cousins living in the United States today. That's about 1 in 8 people!
Here are some other facts about first cousins:
Almost half of all first cousins are married to other cousins. The others are paired up with someone else in the drawing of names from the same family tree.
It is very unusual for two unrelated people to have four first cousins. When this happens, the chances are high that there is some type of mistake in reporting of parents or grandparents. Sometimes these mistakes are found after doing a DNA test and learning that you are not really related at all.
We all know at least one first cousin. They are those relatives who share one of our grand-parents.