Er, yes. To me, quill and qwill are phonetically the same though so…
Quilceda is actually a placename, usually spelled Quil Ceda or Quil-ceda. Name of a river- well, technically a creek. I think it annoys them that it’s also the name of a casino - http://www.quilcedacreekcasino.com/
Being on the east coast and having no wine snob friends to help me out, you read names of wineries and vineyards only to finally hear them and realize you’ve been botching it since day one (hello To-Kalon). One thing you can do is just call the winery. They always answer with the winery name. Then either be polite or just hang up. Haha!
I worked in their tasting room occasionally a long time ago. The #1 question visitors would ask is, “How do you pronounce your name?” I look at them quizzically and answer, “Bob.”