Thus, one can move horizontally across the chart to find their own relationship or another person's to a common ancestor and then move vertically down the chart to find the other person's relationship to the same common ancestor; where the two columns come together the relationship is identified.
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What is a half-second cousin? If you only have one ancestor in common from your great-grandparents, then you are known as half-second cousins.
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Removed: This term describes the relationship between cousins across of different generations.
Our trees have one common name, so we are led to look for a common ancestor there.