What is Lucy's last name in the comic strip "Peanuts"?

Lucille van Pelt is a fictional character in the syndicated comic strip Peanuts, written and drawn by Charles Schulz. She is the older sister of Linus and Rerun. Lucy is characterized as a "fussbudget", crabby, bossy and opinionated girl who bullies most other characters in the strip, particularly Linus and Charlie Brown.

Lucy often mocks and intimidates others, especially Charlie Brown and her younger brother, Linus. She also has a strong unrequited crush on Schroeder (a boy who is a fanatic of the musical works of Beethoven). She is often the antagonist in a number of stories.

Christopher Caldwell (American journalist and a former senior editor at "The Weekly Standard") has said about the character: "Lucy is no 'fussbudget.' She's an American nightmare, a combination of zero brains, infinite appetites and infinite self-esteem, who is (for that reason) able to run roughshod over all her playmates. At her best, she is the most terrifying character in the history of comics."