In that episode, Lois, the “mom” on the show, discovers that her mother, Barbara Pewterschmidt, is a Holocaust survivor who later renounced her Judaism to help her husband get into country clubs (“It was the right thing to do, dear,” says Mrs. Pewterschmidt ).
“So Grandma Hebrewberg is actually Jewish?” exclaims Lois.
“Yes,” her mother explains. “When she moved to America, her family changed their name. It was originally Hebrewbergmoneygrabber.”