After doing some googling, I found a number of different pronunciations:
Shy-rus
Sheer-us (this is the one I've always heard)
Share-us

This site has a number of possibilities. There are 4 different English possibilities depending on which audio button you push.
SHIRAS
Is there one single correct one?

I ran across this pic of a staged moose shoot in Norway. Pretty funny. That's got to be saddest 'moose' I've ever seen.

[Linked Image]

“In a time of deceit telling the truth is a revolutionary act.”
― George Orwell

It's not over when you lose. It's over when you quit.