Relatives
Cousin:  First cousins are people with the same grandparent (i.e., the children of your aunts and uncles).
Second Cousin:  Second cousins are people with the same great-grandparent (i.e., the children of first cousins)
Removed:  The term "removed" describes a relationship from different generations. "Once removed" shows a difference of one generation where "twice removed" shows a two generation difference.  For example, a first cousin to your parent is also your first cousin, once removed.  This is because your common ancestor is a great-grandparent to you but only a grandparent to your parent's first cousin.
Relative Chart:  Pick two people in the family and find their common ancestor in the family tree. (i.e., cousins would have a grandparent in common).  Use the shaded outside row and column for your relationship to the Common Ancestor and the intersection in the table is your relationship with the other relative.
Common Ancestor	Child	Grandchild	Great Grandchild	2nd Great Grandchild	3rd Great Grandchild	4th Great Grandchild	5th Great Grandchild	
Child	Siblings (Brother or Sister)	Nephew or Niece	Grand Nephew or Niece	Great Grand Nephew or Niece	2nd Great Grand Nephew or Niece	3rd Great Grand Nephew or Niece	4th Great Grand Nephew or Niece	
Grandchild	Nephew or Niece	First Cousin	1st Cousin Once Removed	1st Cousin Twice Removed	1st Cousin  3 Times Removed	1st Cousin  4 Times Removed	1st Cousin  5 Times Removed	
Great Grandchild	Grand Nephew or Niece	1st Cousin Once Removed	Second Cousin	2nd Cousin Once Removed	2nd Cousin  Twice Removed	2nd Cousin 3 Times Removed	2nd Cousin 4 Times Removed	
2nd Great Grandchild	Great Grand Nephew or Niece	1st Cousin Twice Removed	2nd Cousin Once Removed	Third Cousin	3rd Cousin Once Removed	3rd Cousin Twice Removed	3rd Cousin 3 Times Removed	
3rd Great Grandchild	2nd Great Grand Nephew or Niece	1st Cousin  3 Times Removed	2nd Cousin Twice Removed	3rd Cousin Once Removed	Fourth Cousin	4th Cousin Once Removed	4th Cousin Twice Removed	
4th Great Grandchild	3rd Great Grand Nephew or Niece	1st Cousin  4 Times Removed	2nd Cousin 3 Times Removed	3rd Cousin Twice Removed	4th Cousin Once Removed	Fifth Cousin	5th Cousin Once Removed	
5th Great Grandchild	4th Great Grand Nephew or Niece	1st Cousin  4 Times Removed	2nd Cousin 4 Times Removed	3rd Cousin 3 Times Removed	4th Cousin Twice Removed	5th Cousin Once Removed	Sixth Cousin