- Common Ancestor
- The first ancestor that you and the other person share or
are directly descended from. For instance, siblings share the
same parents, cousins share the same grandparents and so forth.
- First Cousin
- The first common ancestors you share are your grandparents.
First cousins are the children of your aunts and uncles.
- Second Cousin
- The first common ancestors you share are your
great-grandparents. But not the same grandparents.
- Third Cousin
- The first common ancestors you share are your
great-great-grandparents.
- Fourth Cousin
- The first common ancestors you share are your
great-great-great-grandparents, and so on.
- Removed
- This is where most people get confused. The word "removed"
is used when the two people sharing a common ancestor are from
different generations.
The words "once removed" mean that there is a difference of
one generation. For example, your mother's first cousin is your
first cousin, once removed. The common ancestor is your
grandparents. Your mother's first cousin is one generation
younger than your grandparents and you are two generations
younger than your grandparents. This one-generation difference
equals "once removed."
Twice removed means that there is a two-generation
difference. The common ancestor is your great grandparents. You
are two generations younger than a first cousin of your
grandmother, so you and your grandmother's first cousin are
first cousins, twice removed.
Relationship Charts - An
easy way to determine relationships is to use the chart below.
- The common ancestor is the ancestor you both share. Put
their name is the common ancestor slot.
- Look at the top row of the chart and find the first person's
relationship to the common ancestor.
- Look at the far left column of the chart and find the second
person's relationship to the common ancestor.
- Determine where the row and column containing those two
relationships meet and that is the relationship of the two
descendants of the common ancestor.
Common
Ancestor |
Child |
Grandchild |
G-grandchild |
G-g-grandchild |
| Child |
Sister or Brother |
Nephew or Niece |
Grand-nephew or niece |
G-grand-nephew or niece |
| Grandchild |
Nephew or Niece |
First cousin |
First cousin, once removed |
First cousin, twice removed |
| G-grandchild |
Grand-nephew or niece |
First cousin, once removed |
Second cousin |
Second cousin, once removed |
| G-g-grandchild |
G-grand-nephew or niece |
First cousin, twice removed |
Second cousin, once removed |
Third cousin |
|