Names
- Holabird & Root (1928-1945)1
- Horne, Alderson B1
- Horsfield, George W1
- Howe & Lescaze1
- Howe, M. A. De Wolfe (Mark Antony De Wolfe), 1864-19601
- Hunt, Myron, 1868-19521
- Irwin, Beatrice1
- James, George Wharton, 1858-19231
- Keith, J. C. M. (John Charles Malcolm), 1858-19401
- Kenneth Murchinson Assoc1
- Kimball, Ingalls, 1874-19331
- Kirchmayer, Johannes, 1860-19301
- Lamb, Thos. W. (Thomas White), 1871-19421
- Lambert, Samuel W. (Samuel Waldron), 1859-19421
- Leete, Louise Grosvenor1
- Lethaby, W. R. (William Richard), 1857-19311
- Léon, Maurice, 1880-1
- Ludlow, William S1
- Macy, Valentine Everit, 1871-19301
- Maginnis, Charles Donagh, 1867-19551