I have several problems with hebrew and I would be very grateful if someone could help me

1. I need to translate in hebrew - (I am) "guarded by" or "protected by"
2. What's the spelling of name "Uriel" in hebrew? Is it "alef, vav, yud, alef, lamed" or "alef, vav, resh, yud, alef, lamed"? Or smth absolutely different?

3. Is it possible to translate another name, which probably isn't used in hebrew? It's "Cassiel". I was given an advice that maybe it would look like that - קפציאל ? I'm not sure, of course.
