(39184) Willgrundy = 2000 WG166 William ("Will") M. Grundy (b. 1965), an astronomer at Lowell Observatory, studies icy outer solar system objects. He is involved in the New Horizons mission to Pluto and the Kuiper belt.
A complete set of naming citations of the numbered minor planets is available in the Dictionary of Minor Planet Names, edited by Lutz Schmadel.