[to the [nth (generation)] generation]
0━┳
Rodolphe DUCK & Hortense PICSOU
┣━1─┬
Della DUCK & ? DUCK
┃ ├─1━━
Riri DUCK
┃ ├─2━━
Loulou DUCK
┃ └─3━━
Fifi DUCK
┗━2━━
Donald DUCK
[total][:] 5 后代 (7 [persons] [with] [spouses])