Dating my third cousin
This means neither person is an ancestor of the other, they do not share a parent (siblings), and neither is a sibling of a common ancestor (aunts/uncles and nieces/nephews).In the English system the cousin relationship is further detailed by degree and removal.When the cousins are separated by a different number of generations from the most recent common ancestor, the cousin relationship is "removed".The difference between the number of generations for each cousin is the removal.Those at different levels are "removed." If someone is YOUR first cousin once removed, then you are HIS or HER first cousin once removed also.Your second cousin once removed is the child of your second cousin.(See also REMOVED COUSINS) If someone is your first cousin, then his or her child is your first cousin once removed.
Your great-great aunt is the sister of your great-grandfather or great- grandmother.
Sometimes you and your cousin may share a common ancestor, but you each call this ancestor something different.
For example, the common ancestor may be great-great grandparent.
Your uncle is the brother of your father or mother. Your great uncle (or grand uncle) is the brother of your grandfather or grandmother.
Your great aunt is the sister of your grandfather or grandmother.