His other two sons were also successful scientists, with the pharmacology and physiological chemistry professor Erich Harnack (1853–1914) and the history of literature professor Otto Harnack (1857–1914), father of Arvid Harnack and Falk Harnack.
Theodosius I | Theodosius Dobzhansky | Adolf von Harnack | Theodosius II | Count Theodosius | Theodosius Florentini | Theodosius | ''Saint Ambrose barring Theodosius from Milan Cathedral | Harnack House | Harnack | Arvid Harnack |