A Chart for Figuring Relationships
On the top row, find the relationship of one person to the common ancestor and follow the column straight down. Find the other person's relationship to the common ancestor on the left hand column and follow that row straight across. The relationship is where the projected row and column meet.
 
Common Ancestor
Child
Grandchild
Great Grandchild
Great Great Grandchild
Great Great Great Grandchild
Great Great Great Great Grandchild
Great Great Great Great Great Grandchild
Great Great Great Great Great Great Grandchild
Child
Sibling
Niece or Nephew
Grand Niece or Nephew
Great Grand Niece or Nephew
Great Great Grand Niece or Nephew
Great Great Great Grand Niece or Nephew
Great Great Great Great Grand Niece or Nephew
Great Great Great Great Great Grand Niece or Nephew
Grandchild
Niece or Nephew
First Cousin
First Cousin Once Removed
First Cousin Twice Removed
First Cousin Three Times Removed
First Cousin Four Times Removed
First Cousin Five Times Removed
First Cousin Six Times Removed
Great Grandchild
Grand Niece or Nephew
First Cousin Once Removed
Second Cousin
Second Cousin Once Removed
Second Cousin Twice Removed
Second Cousin Three Times Removed
Second Cousin Four Times Removed
Second Cousin Five Times Removed
Great Great Grandchild
Great Grand Niece or Nephew
First Cousin Twice Removed
Second Cousin Once Removed
Third Cousin
Third Cousin Once Removed
Third Cousin Twice Removed
Third Cousin Three Times Removed
Third Cousin FourTimes Removed
Great Great Great Grandchild
Great Great Grand Niece or Nephew
First Cousin Three Times Removed
Second Cousin Twice Removed
Third Cousin Once Removed
Fourth Cousin
Fourth Cousin Once Removed
Fourth Cousin Twice Removed
Fourth Cousin Three Times Removed
Great Great Great Great Grandchild
Great Great Great Grand Niece or Nephew
First Cousin Four Times Removed
Second Cousin Three Times Removed
Third Cousin Twice Removed
Fourth Cousin Once Removed
Fifth Cousin
Fifth Cousin Once Removed
Fifth Cousin Twice removed
Great Great Great Great Great Grandchild
Great Great Great Great Grand Niece or Nephew
First Cousin Five Times Removed
Second Cousin Four Times Removed
Third Cousin Three Times Removed
Fourth Cousin Twice Removed
Fifth Cousin Once Removed
Sixth Cousin
Sixth Cousin Once Removed
Great Great Great Great Great Great Grandchild
Great Great Great Great Great Grand Niece or Nephew
First Cousin Six Times Removed
Second Cousin Five Times Rremoved
Third Cousin FourTimes Removed
Fourth Cousin Three Times Removed
Fifth Cousin Twice Removed
Sixth Cousin Once Removed
Seventh Cousin
 
(Based on the system used by courts and most genealogical societies.)
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