I know there’s been some discussion here in the past of people whose three names all have the same number of letters. You know: Henry Cabot Lodge, Joyce Carol Oates, Ronald Wilson Reagan, Helena Bonham Carter, Francis Hodgson Burnett.
I didn’t know of any four-word variants, until yesterday, when I was looking at a literary encyclopedia and noticed that Pulitzer Prize-winning former U.S. poet laureate Robert Lowell, arguably the most important American poet of his era, was born Robert Traill Spence Lowell. His parents wanted the symmetry so bad that they doubled the ‘L’?!
Some Googling also turns up Nobel-winning physicist Ernest Thomas Sinton Walton. Are there others, of any word length?