Jewel is only a Chicago-area chain. Most grocery stores are fairly regional, unless they're Whole Foods or Trader Joe's or Wal-Mart or Wegman's (but I think Wegman's is pretty regional, too).
I live in Chicago now, and I was very confused when people would tell me that certain apartments were near Jewel. I thought they were talked about jewelry stores, and I didn't know why that was important