Mr. B

from Wikipedia:

Mr. B may refer to:

George Balanchine, choreographer, co-founder and balletmaster of the New York City BalletMark Braun, a boogie-woogie piano playerBilly Eckstine, a jazz bandleader and balladeerMr. B, a character in the literacy program The Letter PeopleMr. B, a character in Samuel Richardson's book, Pamela, or Virtue RewardedA codename for John Murphy, a loyalist paramilitary from Northern IrelandThe nickname of Bernard Lansky, the owner of the famed Lansky Brothers clothier in Memphis, Tennessee.Mr. B The Gentleman Rhymer, alter ego of musician Jim Burke