A CHART OF CONSANGUINITY

"A Kinship or Relationship Chart"
Helps to identify the relationship of those sharing common ancestors.

O P 1GP 2GP 3GP 4GP 5GP
P S N GN 2
GN		 3
GN 		4
GN
1GP N 1C 1C
1R		 1C
2R		 1C
3R		 1C
4R
2GP GN 1C
1R		 2C 2C
1R 		2C
2R 		2C
3R
3GP 2GN 1C
2R		 2C
1R 		3C 3C
1R 		3C
2R
4GP 3GN 1C
3R 		2C
2R 		3C
1R 		4C 4C
1R
5GP 4GN 1C
4R 		2C
3R 		3C
2R 		4C
1R 		5C
Definitions:
C = Cousin
G = Great/Grand
N = Nephew/Niece
O = Original Couple
P = Parents
R = Removed
S = Sibling (brother or sister) 		1GP = GrandParents
1C = First Cousin
2GP = Great Grand Parents
2C1R = Second Cousin, Once Removed
GN = Grand Nephew/Niece
3GN=Great Great Grand Nephew/Niece
5GP = Great Great Great Great Grand Parents

Locate one person along the top row, according to his/her relationship to the Original Couple (O). Locate the other person along the left hand column, according to her/his relationship to the same Original Couple and where the two lines cross indicates the relationship of the two people to each other. If needed, the pattern can easily be extended.
Example: If William and Hannah (O) are your grandparents (1GP) and they are also your cousin Sally's great-grandparents (2GP), then you and Sally are first cousins, once removed (1C1R).
If the Original Couple (O) are your parents (P) and they are also my parents (P), then you and I are Siblings (S).

If the Original Couple (O) are my Grandparents (1GP) and they are also your Grandparents (1GP), then you and I are first cousins (1C).

My Great Grand Mother's brother is my Great Grand Uncle and I'm his great-grand-nephew (2GN). The Original Couple (O), who are their Parents (P), are also my Great Great Grand Parents (3GP).

In reverse, if someone is your third cousin (3C), it means that you both share the same great-great-grandparents (3GP).

Be sure to use the closest Original Couple that you share or you can come up with such ridiculous things as:
Since my Grandparents (1GP) are my son's Great-Grandparents (2GP), therefore my Son is my first cousin, once removed (1C1R). Whoa...!
Kith and Kin
HALF - Means you share only one parent. Example: half-brothers may have the same father but different mothers, etc.

STEP - Not blood kin, but a close legal relationship due to re-marriage of a parent, such as step-mother, step-brother, step-son, etc.

DOUBLE FIRST COUSINS - Are first cousins twice, once on your Father's side and once on your Mother's side, since your Father's sibling married your Mother's sibling.

IN-LAW - They are not really blood kin but are treated as such because they married blood kin.
Example: Your Mother-in-law is not really your Mother but is treated as such because you married her daughter/son. In law, you and your spouse are considered "one". Also your brother-in-law is your brother because your parents are also his parents, in "law" (Mother-in-law, Father-in-law, etc.).

ADOPTIONS - A person adopted is a person especially chosen. In natural birth, we just take what we get. In adoption we have the opportunity to be selective. The state recognizes this special relationship by making an adoptee equal in every respect with a child of regular birth.

KITH and KIN - "Kith" are close friends and acquaintances whereas "Kin" are blood relatives or someone treated as such, in law.

DEGREES - The Roman Catholic Church has devised a complicated set of rules for its members as to who may marry whom. However the rules only apply to their own members and they frequently make exceptions or dispensations. See the articles on Google.
ANOTHER METHOD - The number of "G"s you share is the number of cousins you are. The difference in "G"s is the number "Removed".
Example: Two people who have the same great-grand-parents (2GP) are second cousins (2C). If the great-grand-parents (2GP) of one person are the great-great-grand-parents (3GP) of the other person, then those two people are second cousins, once removed (2C1R). They share 2G with a difference of 1G (3-2=1). Compare the chart.

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However, it is copyrighted so please do not copy it to your site and claim it as your own (as some have done).
Comments and corrections are always appreciated.

Copyright © 1996-2008
John Longstreet Rhymes
New Orleans