x x

父母

[full siblings]

祖先

[the great-grandparents]

     x x   x x   x x   x x   x x   x x
  |
10		   |
11		   |
12		   |
13		   |
14		   |
15
 
 
 
  |   |   |

[the grandparents]

 x x   x x   x x   x x
|
4		   |
5		   |
6		   |
7
 
|   |

[the parents]

 x x   x x
|
2		   |
3
|
  x x