• Dahl, Anders (Andreas)
• David, Jeanne Pere Armand
• Davidson, B. LeRoy
• Delavay, Father Jean Marie
• Deutz, Johann van der
• Dickson, James
• Dieffenbach, Johann Karl Ernst

• Dillon, Helen
• Discorides, Pedanius
• Dirr, Michael
• Douglas, David
• Downing, Andrew Jackson
• Druce, George Claridge
• Drummond, James
• Duchêne, Achille Jean Henri

James Dickson