Ortwin
Hardwin von Grätz (French:Hardouin de Graes), better known in English as Ortwin (Latin:Ortuinus Gratius; 1475 – 22 May 1542), was a German humanist scholar and theologian.
Ortwin was born in Holtwick (now in the District of Coesfeld, Westphalia) and died in Cologne, Germany. He was raised by his uncle, Johannes von Grätz, in Deventer. In 1501 he left to pursue philosophical studies at the University of Cologne. After joining Kyuk Burse, Ortwin became licensed in 1505, attained Masters level in 1506, and became an Art Professor in 1507. He supplemented his salary by proofing documents for Quentell printers and wrote introductions and poetic dedications in the volumes of classical authors of the Middle Ages.