A CHART OF CONSANGUINITY

Helps to identify the relationship of those with a common ancestor.

O	F	GF	GGF	3GF	4GF	5GF
F	S	N	GN	2GN	3GN	4GN
GF	N	1C	1C 1R	1C 2R	1C 3R	1C 4R
GGF	GN	1C 1R	2C	2C 1R	2C 2R	2C 3R
3GF	2GN	1C 2R	2C 1R	3C	3C 1R	3C 2R
4GF	3GN	1C 3R	2C 2R	3C 1R	4C	4C 1R
5GF	4GN	1C 4R	2C 3R	3C 2R	4C 1R	5C

C = Cousin
F = Father
G = Great/Grand
N = Nephew/Niece
O = Original Ancestor
R = Removed
S = Sibling

Examples:
1C = First Cousin
GGF = Great Grand Father
2C1R = Second Cousin, Once Removed
GN = Grand Nephew/Niece

Locate one person along the top row, according to his relationship to the Original Ancestor. Locate the other person along the left hand column, according to his relationship to the same Original Ancestor and where the two lines cross indicates the relationship of the two people to each other.

If my Grandfather (GF) is also your Grandfather (GF), then you and I are first cousins (1C).

My Great Grand Mother's brother is my Great Grand Uncle (and I'm his GGN). Our Original Ancestor is his Father (F), who is also my Great Great Grand Father (GGGF).

Be sure to use the nearest Original Ancestor or you can come up with such ridiculous things as: Since my Grand-Father (GF) is my son's Great-Grandfather (GGF), therefore my Son is my First Cousin, once removed (1C1R).

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