- Jansson, Jan, 1588-16641
- Jentzsch, Alfred, 1850-19251
- John Bartholomew and Son1
- Jonasson, Olof Georg, 1894-19651
- Kartografiska institutet, AB.1
- Kennet and Avon Canal Company1
- Kenyon Company (Des Moines, Iowa)1
- L'Isle, Guillaume de, 1675-17263
- Lapie, M. (Pierre), 1779-18501
- Larcom, Thomas A. (Thomas Aiskew), 1801-18791
- Laurie, Richard Holmes1
- Lithuanian National Council (U.S.)1
- Lizars, Daniel, 1760-18121
- Lobeck, A. K. (Armin Kohl), 1886-19581
- London Geographical Institute1
- Madureira Beça, José A. F. de1
- Makarova, V. M1
- Matthews-Northrup Works1
- Max Freissler (Firm)4
- Mejer, Johannes, 1606-16741