The benefits of short surnames

From a Wall street Journal interview (subs. req'd) with Maureen O'Hara (not to be confused with Mia's mom, Maureen O'Sullivan) at a book signing for her autobiography Tis Herself (not to be confused with Tis, by Frank McCourt):

The book chronicles Ms. O'Hara's happy Dublin childhood, the second of six children in a close-knit artsy family; her years in Hollywood, protege of Charles Laughton, who gave the 18-year-old Maureen her first movie roles and her screen name because her given name, Fitzsimons, wouldn't fit on a marquee;