Alfred Theophil Holder (Vienna, 4 April 1840 – Karlsruhe, 12 January 1916), was chief librarian of the Baden State Library (Badische Landesbibliothek) in Karlsruhe. He was an Austrian-German writer and student of several ancient languages including Celtic, Germanic, and Latin. He is best known for his translations of Horace, Caesar and Tacitus as well as for his three volume Celtic vocabulary entitled: Alt-celtischer Sprachschatz.
He studied classical and German philology at the universities of Bonn and Heidelberg, then continued his education in Paris. From 1863 he worked as a schoolteacher in Rastatt, the Netherlands and in Ladenburg. In 1867 he joined the Grand Ducal Baden Court and State Library in Karlsruhe, where he remained for the rest of his life — in 1904, he became head of the manuscript department and in 1911 was appointed director.
Opera recensvervnt O. Keller et A. Holder, 2 volumes, 1864-70 (with Otto Keller).
Altdeutsche Grammatik, umfassend die gotische, altnordische, altsächsische Sprache, 1870 (original author: Adolf Holtzmann) – Old Germanic grammar; Gothic, Old Nordic, Old Saxon languages.
Waltharius: lateinisches Gedicht des zehnten Jahrhunderts (edition of "Waltharius", original author: Ekkehard I, Dean of St. Gall, with Joseph Victor von Scheffel), 1874.
De origine et situ Germanorum liber (edition of Tacitus) 1878.
Q. Horati Flacci opera, 4 parts (edition of Horace) 1878, with Otto Keller.
Einhardi Vita Karoli imperatoris, (edition of Einhard) 1881.
Beowulf, 2 parts (edition of "Beowulf") 1882-84.
Baedae Historia ecclesiastica gentis Anglorvm (edition of Bede, the Venerable), 1882.
Saxonis Grammatici Gesta Danorvm, (edition of Saxo Grammaticus) 1886.
Herodoti Historiae, 2 volumes (edition of Herodotus) 1886-88.
Rufi Festi Avieni Carmina (edition of Avienus), 1887.
Historiarum liber quintus, 5 volumes 1887-90.
Commentum in Horatium Flaccum, (edition of Pomponius Porphyrion) 1894.
Alt-celtischer Sprachschatz, 3 volumes. 1896-1919.
C. Iuli Caesaris belli civilis libri III, (edition of Julius Caesar) 1898.
Favonii Eulogii Disputatio de Somnio Scipionis, (edition of Favonius Eulogius) 1901.
From 1895 to 1918, he authored volumes 3, 5–7 of the Die Handschriften der Grossherzoglich Badischen Hof- und Landesbibliothek in Karlsruhe (The manuscripts of the Grand Ducal Baden Court and State Library in Karlsruhe).
