4 X Great Grandparents / \ 3 X Great 4 X Great Grandparents Uncle-Aunt / \ \ 2 X Great 3 X Great 1st Cousin Grandparents Uncle-Aunt 4 X Removed / \ \ \ Great 2 X Great 1st Cousin 2nd Cousin Grandparents Uncle-Aunt 3 X Removed 3 X Removed / \ \ \ \ Grand Great 1st Cousin 2nd Cousin 3rd Cousin Parents Uncle-Aunt 2 X Removed 2 X Removed 2 X Removed / \ \ \ \ \ Father Uncle 1st Cousin 2nd Cousin 3rd Cousin 4th Cousin Mother Aunt Once Removed Once Removed Once Removed Once Removed / \ \ \ \ \ \ ME Brother 1st 2nd 3rd 4th 5th Sister Cousin Cousin Cousin Cousin Cousin \ \ \ \ \ \ Son Nephew 1st Cousin 2nd Cousin 3rd Cousin 4th Cousin Daughter Neice Once Removed Once Removed Once Removed Once Removed \ \ \ \ \ Grand Grand 1st Cousin 2nd Cousin 3rd Cousin Child Nephew-Neice 2 X Removed 2 X Removed 2 X Removed \ \ \ \ Great Great Grand 1st Cousin 2nd Cousin Grandchild Nephew-Neice 3 X Removed 3 X Removed \ \ \ 2 X Great 2 X Great Grand 1st Cousin Grandchild Nephew-Neice 4 X Removed \ \ 3 X Great 3 X Great Grand Grandchild Nephew-Neice \ 4 X Great Grandchild
If you have ever wondered about your relationship to a distant cousin, or come across the term "second cousin, once removed", this chart may help to find where they fit into the family. The diagonal ascending lines are the parents and the diagonal descending lines are the children. For example, if you have the same Great-Great Grandparents as someone, you are 3rd cousins. If your Great Grandfather is his Great Great Great (3 X) Grandfather, you are second cousins, twice removed (2 X). I don't know why, but Uncles and Aunts can be Great but never Grand.
The chart above can be extended to the upper right and lower right as far as desired for whatever degree of cousin you want. I guess eventually we are all related in some way.
(from the internet - author unknown)