Cian is pronounced KEE-an, just like
Cillian is KILL-ee-an and
Ciaran is KEER-an. I myself steer away from the C spellings of these names, though, because of the extreme likelihood of being mispronounced in the U.S. Apparently.
~
Heather~
"Why is it that, as a culture, we are more comfortable seeing two men holding guns than holding hands?" -
Ernest Gaines