為什麼哈利波特的爺爺奶奶都不在了，按年齡推算不應該呀?

01-14

首先你要知道，JKR 她構造了足夠詳盡的一個世界，很多細節和背景即使沒在書中提及也會在各種訪談中被挖掘出來。所以，有疑問的時候上網搜搜看，多半能找到。比如你問的這個問題，早在第六部發布時 JKR 就已經解答了。

以下為 MuggleNet 與 The Leaky Cauldron 的那次聯合訪談的一段：

MA: What about Harry』s family — his grandparents — were they killed?
JKR: No. This takes us into more mundane territory. As a writer, it was more interesting, plot-wise, if Harry was completely alone. So I rather ruthlessly disposed of his entire family apart from Aunt Petunia. I mean, James and Lily are massively important to the plot, of course, but the grandparents? No. And, because I do like my backstory: Petunia and Lily』s parents, normal Muggle death. James』s parents were elderly, were getting on a little when he was born, which explains the only child, very pampered, had-him-late-in-life-so-he』s-an-extra-treasure, as often happens, I think. They were old in wizarding terms, and they died. They succumbed to a wizarding illness. That』s as far as it goes. There』s nothing serious or sinister about those deaths. I just needed them out of the way so I killed them.
via: TLC Interviews Joanne Kathleen Rowling, Part III

Harry 的外公外婆很平凡，以 Muggle 的方式正常去世。而爺爺奶奶有獨生子 James 的時候已經是老來得子（Sirius 在16歲離家出走住到 Potter 家時那麼受歡迎恐怕也有這一部分原因吧），後來年紀大了就去世了。總之就是 JKR 希望 Harry 是個准孤兒所以不想要祖父母們來摻和。

我記得書里提到過，哈利的父親詹姆是老來子，而且是獨子，詹姆的父母好像在哈利出出生前就自然死亡了。

爺爺奶奶無非是扮演智慧或慈愛的長者角色，在HP系列裡，鄧布利多和小天狼星取代了這兩者的位置，與爺爺奶奶的角色定位存在一定衝突，再加上佩妮姨媽的暗線安排，哈里從小寄養在姨媽家更符合故事的邏輯。因此，與其浪費筆墨去描寫和故事情節無關的爺爺奶奶，不如選擇性的忽略他們，也給同人控和未來的續寫留下想像發揮的空間。讀者可自動腦補他們過世早，抑或是。。。詹姆波特是類似悟空的無性繁殖