I like
Shai (which is pronounced "Shy") for a boy, for what it's worth.
Honestly I don't think it's bad. They're not names I'd use but I like the sound of both. Not sure how I feel about them being in a sibset together.
And I certainly prefer
Slade and Shy over Slayden and Shylynn or something. You know they're out there.
"than you will go to jail for kidnap."
top: Helena
bottom: Silence
http://www.behindthename.com/pnl/59411