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