This distinguishes a cousin from an ancestor, descendant, sibling, aunt, uncle, niece, or nephew.
Systems of "degrees" and "removals" are used in the English-speaking world to describe the exact relationship between two cousins (in the broad sense) and the ancestor they have in common.
Third cousins share at least one set of great-great-grandparents.
In the example to the right Sam and Lyla are third cousins.
Cousinship between two people can be specifically described in degrees and removals by determining how close, generationally, the common ancestor is to each person.
Another visual chart used in determining the legal relationship between two people who share a common ancestor is based upon a rhombus shape, usually referred to as a "canon law relationship chart".
In the example to the right Gordon and Julie, as well as Joseph and Matt, are first cousins once removed.
If the cousins are removed, the smaller number of generations to the most recent common ancestor is used to determine the degree of the cousin relationship.
In the example to the right Gordon and Matt are second cousins.
A person shares a third cousin relationship with the children of their parents' second cousins.
Various governmental entities have established systems for legal use that can precisely specify kinship with common ancestors any number of generations in the past, though common usage often eliminates the degrees and removals, and refers to people with common ancestry as simply "distant cousins" or "relatives".
People are related with a type of cousin relationship if they share a common ancestor and the most recent common ancestor is two or more generations away from both people.
Upon determining that place along the opposing outside edge for each person, their relationship is then determined by following the lines inward to the point of intersection.