你为什么要叫捷克？ 英文怎么说

Why are you named Jack?

这么问太唐突了吧
委婉一点，问他“你的名字杰克是怎么来的？”比较好吧？你说呢？

Is there a story behind your name Jack? Would you like to tell it to me?
你叫杰克这个名字背后有没有什么故事啊？你愿意告诉我吗？

why is your name Jack?

Why do you want to call the Czech Republic?

why you called JACK?