Johann Friedrich Hennert

Johann Friedrich Hennert was German-born and lectured in mathematics and physics at the University of Utrecht, born on 19 October 1733 and dead on 30 March 1813. He was a significant student of Leonhard Euler and was known for his inclination towards the British school of philosophy. He held the chair of mathematics at Utrecht until 1805, wrote a number of textbooks on differential calculus, and was an important figure in the history of Dutch mathematics, with Jean Henri van Swinden among his most important students. In 1769 he married the poet and scientist Petronella Johanna de Timmerman, and in 1786 he wrote her biography and published her poems as Nagelaatene gedichten.