Degrees of relationship

The degree of relationship is the degree like far 2 persons is related with one another.
Two different systems are differentiated:
- The degrees of relationship of the Roman-catholic church (the canonical right)
- The degrees of relationship of the civil right (the Roman right)

Source

The canonical right

In the canonical right the number of generations from the reference person to the goal person is counted.

3       [ Y ]       2
       |       
   + – – – + – – – +   
   |           |   
2   [ X ]           [ X ]   1
   |           |   
1   [ X ]           [ B ]   
   |               
   [ A ]               

The person [ Y ] is simultaneous the great-grandfather (3 generations) of the person [ A ] and the grandfather (2 generations) of the person [ B ].
After the canonical right the persons [ A ] and [ B ] are blood related in the 2nd and 3rd degree.

 

The Roman right

In the Roman right the number of births from the reference person to the goal person is counted.
One differentiates between here 2 lines:
- In straight lines line
  Of the straight line one speaks, if the family relation in a straight line runs.
- In the branch line
  Of the branch line one speaks, if the family relation in corners runs.

     [ Y ]     
     |     
+ – * – + – * – +
|           |
[ X ]           [ X ]
|           |
*           *
|           |
[ X ]           [ B ]
|            
*            
|            
[ A ]            

Between the person [ A ] and the person [ B ] 5 births lie.
After the Roman right the persons [ A ] and [ B ] are blood related in the 5th degree in the branch line.