(23699) Paulgordan = 1997 ND3
Paul Albert Gordan (1837-1912) was a German mathematician
who taught at the University of Erlangen. He did research
in the theory of invariants of algebraic forms, as well as on the
substitution groups associated with the solution of algebraic
equations.
A complete set of naming citations of the numbered minor planets is available in the Dictionary of Minor Planet Names, edited by Lutz Schmadel.