- Hollembaek, Henry.1
- Homœopathic Medical Society of the State of Pennsylvania.1
- Hoppin, George W.1
- Howard, Horton, 1770-18331
- Hoyne, Temple S. (Temple Stroughton), 1841-18991
- Hudson, A. S.1
- Humphreys, F. (Frederick), 1816-19002
- Ḥusaynī, Muḥammad Muʼmin, -16981
- Jahr, G. H. G. (Gottlieb Heinrich Georg), 1800-187521
- Jahr, G. H. G. (Gottlieb Heinrich Georg), 1800-1875, author1
- Jessen, H. C.1
- Johnson, I. D. (Isaac D.), 1827-19112
- Jones, Stacy, 1828-19053
- Joslin, Benjamin F. (Benjamin Franklin), 1796-18611
- King, John C.1
- King, John, 1813-18931
- Kitzmiller, John.1
- Knerr, Calvin B. (Calvin Brobst), 1847-19401
- Kost, J., 1819-19044
- Kunzé, Richard E. (Richard Ernest), 1837-1919, author1