J2M, former CEO of Vivendi-Universal Jean-Marie Messier
LBJ, U.S. President Lyndon Baines Johnson (It must be noted that Johnson so liked his initials that his children and dogs all had them, and he nicknamed his wife Lady Bird so she could have them too)
L, Linnaeus, founder of modern systematics, cited by biologists simply as (L) when referenced as author (first official describer) of a species. Note that (L) is truly understood to stand for the man Linnaeus himself, in contrast to an SI unit name like N, which does not stand for the man Newton, but for a physical unit spelled in lower-case that is named in honor of the man Newton.
TAFKAP, U.S. soul singer Prince, abbreviation for The Artist Formerly Known as Prince, which replaced an unpronounceable symbol as his name. He has since reverted to using his first name of Prince.
