Which of the following was NOT one of the alternate surnames that Betsy Ross used in her lifetime?

Ross was the name she got from her first husband.  He died early in the Revolutionary War.

Ashburn was the name of her second husband and Claypoole was husband no. 3.

Griscom was her maiden name.

As for Ludwig, that was the maiden name of Molly Pitcher, who was famous for fighting alongside the men in the Revolutionary War.