The term cousin typically refers to the child of one's parent's sibling. This is more correctly termed a "first cousin". More generally, "cousins" are any relatives that are neither siblings nor direct descendents/ancestors. Ordinal numbers (first, second, third, etc) are used to quantify in which preceding generation the common direct ancestor is located. The term is then completed with a number removed, which indicates how many generations separate the relatives in question.

Thus, if one of John's great-great-grandparents is also one of Mary's great-great-great-great-grandparents, John and Mary are "third cousins twice removed". John Major, PM of the U.K. 1990-1997 John is a common name for males. ... Mary is a popular name worldwide, and the most popular name for a female in the United States. ... John Major, PM of the U.K. 1990-1997 John is a common name for males. ... Mary is a popular name worldwide, and the most popular name for a female in the United States. ...

The following chart helps to explain the cousin relationships (the term 'Niece' is used to mean 'Niece or Nephew' and is used only for brevity): This article is about the domestic group. ... This article is about the domestic group. ... This article is about the domestic group. ...