| Source: World War I: Biography and Service Records:
Persons Who Enlisted in St. Louis City and
County Location: Reading room / St. Louis shelves | |
 | |
| Last Name: | Lavan |
| First Name: | John |
| Middle Name: | Leonard |
| Title: | Dr. |
| Illustration: | No |
| Rank: | Lieutenant |
| Birth Year: | 1890 |
