What Is a Fourth Cousin?
A fourth cousin is someone in a family who shares the same great-great-great-grandparents. First cousins share the same grandparents and second cousins have the same great-grandparents. Ordinal numbers of cousins are in the same generation as each other. For instance, all of the children of siblings are first cousins.
Cousins who have children are different degrees of “removed.” For example, the children of a first cousin are considered a first cousin once removed. The term removed in this case refers to being one generation removed from another person. The first cousin of a grandmother is technically considered a first cousin twice removed because there is a two-generation difference.
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