For a true "relationship" to exist, there must be an ancestor who is common to both individuals.

There are two different ways to calculate the relationship. Both ways work with the same principle and the results are the same, only the headings are different. Choose the one most convenient to you.

 Instructions:

1, Identify the most recent common ancestor of the two individuals with the unknown relationship.

2, Determine the common ancestors' relationship to each person.

    Example: great-grandson (if using chart 1); or great-grandparent (if using chart 2)

3, In the topmost row of the chart, find the common ancestors' relationship to cousin number one. In the far-left column, find the common ancestors' relationship to cousin number two.

4, Trace the row and column from step 3. The square where they meet shows the two individuals' relationship.

Relationship chart 1

Relationship chart 2