Isbrand van Diemerbroeck (also Ijsbrand or Ysbrand) (13 December 1609 – 16 November 1674) was a Dutch physician, anatomist, and professor.
He studied first in Utrecht, and then in Leiden under Daniel Heinsius and Otto Heurnius.
He wrote about his experiences in treating the plague in his 1646 work De Peste.
[1] In 1649 he became a professor of medicine and anatomy at Utrecht University,[2] where Regnier de Graaf was a student of his.
His son Timann van Diemerbroeck, also a physician, collected his father's works in the 1685 Opera omnia.