I don't know all of them, not being fluent, but I can help somewhat.

In Irish:
"Suigh!" = sit!
"Fan!" (my apologies to any Swedes reading this...) = wait!
"suis" means down, but I don't know if it can be used in that manner; somehow I'm guessing it can't.
"No!" = No idea. Irish doesn't have yes or no the way english does, so I'm sure a native speaker can help you better.

As for something similar sounding to Rudy there's the word for "things": rudaí. Not sure how a dog would feel about being called multiple unspecified objects though.