Mar 18 Gottfried Wegner, German theologian, hymn composer, and court preacher at Konigsberg, born in Oels, Duchy of Oels (now Oleśnica, Poland) (d. 1709) Mar 20 Ivan Mazepa, Cossack Hetman of the Hetmanate (d. 1709) 1643 Famous Birthdays by Year 1645