| NAME ▲ | ▼ | VESSEL ▲ | ▼ | RIG | YEAR ▲ | ▼ | AGE | MORE |
|
| Jack Lony ? | Sarah Louisa | Brig | 1840 | 22 | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Sarah Louisa | Brig | 22 | | | | | Hair | Eye | Residence | Rank | Remarks | | | | Cape Verde | | | | |
|
| Jack Lopes | Arthur V. S. Woodruff | Schr | 1912 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Arthur V. S. Woodruff | Schr | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | New Bedford, Ma | | | | |
|
| Jack Lopes | Claudia | Schr | 1919 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Claudia | Schr | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | 3rd Mate | | | |
|
| Jack Luce | Midas | Ship | 1832 | 17 | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Midas | Ship | 17 | 5' 8" | Dark | | | Hair | Eye | Residence | Rank | Remarks | | Brown | | Fyal | | | | |
|
| Jack Ludriff | Montezuma | Schr | 1840 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Montezuma | Schr | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | Seaman | ON AT SOCIETY ISLANDS 08/29/1842 | | |
|
| Jack Ludriff | Montezuma | Schr | 1840 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Montezuma | Schr | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | | DID NOT RETURN FROM VOYAGE | | |
|
| Jack Lundborg | Pedro Varela | Schr | 1916 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Pedro Varela | Schr | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | Seaman | | | |
|
| Jack Lybuai | Erie | Ship | 1844 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Erie | Ship | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | Seaman | ON AT TAHITI 01/25/1845 | | |
|
| Jack M. Gonagale | Moss | Bark | 1833 | 17 | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Moss | Bark | 17 | 5' 4" | Light | | | Hair | Eye | Residence | Rank | Remarks | | Brown | | Phila. | | | | |
|
| Jack M. Hosmer | General Scott | Bark | 1855 | 21 | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | General Scott | Bark | 21 | | Light | | | Hair | Eye | Residence | Rank | Remarks | | Brown | | Middlebury, Vt | | | | |
|
| Jack Machado | Milton | Ship | 1880 | 22 | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Milton | Ship | 22 | 5' 10" | Dark | | | Hair | Eye | Residence | Rank | Remarks | | Black | | Brava | | | | |
|
| Jack Macy | A. R. Tucker | Bark | 1883 | 19 | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | A. R. Tucker | Bark | 19 | 5' 5" | B | | | Hair | Eye | Residence | Rank | Remarks | | B | | Brava | | | | |
|
| Jack Madara | Maria Theresa | Ship | 1847 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Maria Theresa | Ship | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | Boatsteerer | | | |
|
| Jack Madeira | Heroine | Ship | 1843 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Heroine | Ship | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | | Ordinary | | | |
|
| Jack Madera | Maria Theresa | Ship | 1845 | | ⊕ |
| | | Vessel | Rig | Age | Height | Skin | | Maria Theresa | Ship | | | | | | Hair | Eye | Residence | Rank | Remarks | | | | Fayal | | | | |
|
