Globally, Janiszewski (Janiszewski 
, Янишевский 
) is an extremely rare male forename. Likewise, Janiszewski is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Janiszewski | United States, France, Poland, Germany, Brazil |
| Янишевский | Ukraine, Russia, Belarus, Kazakhstan |
Janischewski, and Yanishevsky
| bogdan janiszewski (b. 1885) |
|
|
| lech janiszewski PL (b. 1951) |
|