I need a Greek translation for a tattoo.?

I need a Greek translation for a tattoo,
"Rest in peace" and "watch over me". cheers.

How to say (and write) Cheers in Greek?

How to say and write cheers (when you toast) in Greek? I heard it's something like yiamas. But I don't exactly know what the meaning (if yiamas is the word), the root word/origin etc. If someone could also tell me how to write it in Greek alphabet, that would be great! Efharisto