Guillain may refer to:
People
Georges Guillain (1876–1961), French neurologist Gilles Guillain (born 1982), Colombian-born French actor Robert Guillain (1908–1998), French journalist and author of several books on Japan
Medical
Guillain–Barré syndrome, an acute polyneuropathy, a disorder affecting the peripheral nervous system Triangle of Guillain-Mollaret, the myoclonic triangle, an important feedback circuit of the brainstem
See also
Guillan (disambiguation)