The failure to understand the difference between first, second, and third cousins makes the family tree with cousins template appear confusing. The number only represents the generational difference in common ancestors.
First cousins have a common grandparent at about two generations, while second cousins share a great-grandparent at about three generations. Third cousins have a common great-great-grandparent and are separated by four generations in your family tree with cousins template.
Generally, you determine the cousin number by counting the “greats” in your common ancestor’s title and adding 1. For instance, if you share a grandparent, the number of “greats” is 0 + 1= 1. Therefore, these individuals are your first cousins.