We say See-lig. However, we've found records of it being spelled "Selige" and don't know how that would have been pronounced. Legend goes that my grandfather didn't like it with the "e" on the end so simply stopped writing it that way (on his kids birth certificates and such). We hear other people say sell-lig a lot and when we say it allowed, many people want to spell it with a "C" - Celig. I've heard of the Say-lig or Zay-lig (Zay-lic?) pronunciation before too.