[maternal grand-parents], strici in tete

- x x
- x x
- - x x
    └ x x
    2
    
    └ x x
    1
  - x x
    └ x x
    2
  - x x

x x

  

x
x

 

x
x

  

|

|

  

│

x
x

  

x
x

│

│

│

x
x

[half siblings]

Po strani x x

z x x
- x x
- x x