Marian's (and sister spelling Marion's) image has gone through a sea change of late, recalling less middle-aged matron and more Robin Hood's romantic Maid Marian. Some influences: the SJ Parker-M. Broderick twin daughter Marion and the glamorous French actress Marion Cotillard.
Marian was a Top 100 name from 1912 through 1934.
Marian Anderson was a great African-American contralto singer and Marion (born Marian) Ross was the mom on Happy Days. And--trivia tidbit--Marion Tweedy was the maiden name of Molly Bloom in James Joyce's Ulysses.