Martin Heinrich Rathke first described in 1839 the embryonic structure, now known as Rathke pouch, from which the anterior lobe of the pituitary gland develops 1)
Purkinje cells, or Purkinje neurons, are a class of GABAergic neurons located in the cerebellum. They are named after their discoverer, Czech anatomist Jan Evangelista Purkyně, who characterized the cells in 1839.
1)
Ueber die Entstehung der Glandula pituitaria. Archiv für Anatomie, Physiologie und wissenschaftliche Medicin, Berlin, 1838: 482-485.