Agreed, where I lived in NY as a kid we had the Schuylkill River and it was pronounced more like "School-Kill" or "Skoo-Kill" as surgent suggests. I would be curious where you heard it as "Sish-yoi-le-kill".
Admittedly I have heard a lot of other words pronounced differently in local areas, for example "Louisville" in Colorado is "Lewis-ville" not "Louie-Ville" as it is in KY, and Cairo in Illinois is pronounced "Kay-Row" (like the boys name Ray).
Hey guys, I heard it pronounced "Shish-yoi-le-kill" from one of my buddys that lives in Gunnison. He said he climbed it 3 years ago and someone at the coffee store in town said it was pronounced like that so thats where I got it from. It could be pronounced either way, I have no clue.
"Got tight last night on absinthe and did knife tricks. Great success shooting the knife into the piano. The woodworms are so bad and eat hell out of all furniture that you can always claim the woodworms did it."