- Leo Popper
- Edwin S. Popper (1st son)
- Caleb S. Popper (2nd son)
- Emil L. Popper (3rd son)
- Robert (Edwin L.'s older brother)
- Edwin L.
- Karl Meyer · Bookeeper
- Joe Schweitzer
- Andy Clarke
- Eddie Clarke (whose father is also an employee)
- "Mr. Leonard" ("He's been with us since the year one" --Ed)
- Allen Clark purchased the last of Popper's button molds; it's
thought some of them may have been Burlich Brothers and Heidts'
- Charles Kaziun, paperweight maker, "purchased his glass cane from Leo..."