Not likely. If it were, it would be called Hughes University.
Yes, I believe there is a school in Seattle called Langston Hughes Academy.
Columbia University and Lincoln University
no
James Mercer Langston Hughes [February 1, 1902-May 22, 1967] reached an agreement with his father: the study of engineering, in exchange for financial support to enroll at and graduate from Columbia...
yes he did and graduated in 1929 with a B.A. degree