Kennedy, married his second cousin, Mary Josephine Hannon.
Rudy Giuliani, former mayor of New York, married his second cousin once removed, Regina Peruggi Samuel F. Morse, inventor of the Morse Code, took his first cousin once removed, Sarah Elizabeth Griswold, as his second wife.
You may have heard some people use phrases like “she’s my fifth cousins, twice removed,” or “he’s my second cousin, nine times removed.” What does this mean and how could I figure out my relationship to my friend using these terms?
In English, there are specific terms to describe the relationships between people of the same generation, meaning people who are the same number of generations from a common ancestor.
Banning Cousin Marriages While there have been instances of the banning of marriage between cousins at various points through history, such as the Roman Catholics banning the practice for a time starting with the Council of Agde in 506 AD, for the most part marriage among cousins has been popular as long as people have been getting married.
Franklin Delano Roosevelt and Eleanor Roosevelt were fifth cousins, once removed (a chart showing their relationship is available at
John Adams married his third cousin, Abigail Smith. Fitzgerald, former mayor of Boston and grandfather of John F.
"The formation of densely populated urban regions that offer a large selection of distantly related potential spouses is a new situation for humans in evolutionary terms," the researchers write in the Feb. During the past two centuries, the researchers point out, the average relatedness of Icelandic couples has widened from third and fourth cousins to the more recent couple relatedness of fifth cousins. Children of first cousins are second cousins, and their children are third cousins.) Cousin Couples The results make sense from a biological perspective.
"Our definition of a species is a group of individuals who are closely enough related to each other to be able to have offspring," said lead author Kari Stefansson of the University of Iceland in Reykjavik.
My third great grandfather was her fourth great grandfather.