While I like the sound of
Zion, it feels very religious to me and if I were to have a child, both of his parents would be atheists, so no thank you.
Also
Zia /
Ziya sounds better in the combo when the last name (which starts with S and ends with -on) is added;
Zion creates too many repeating sounds imo.
"than you will go to jail for kidnap."