Cognomen Kaselionis (Kaselionis 
) , in the entire world, is a very rare family name. The family name Kaselionis is habitual in Lithuania, where it is quite a rare surname, the United States, where it is an extremely rare surname, and Canada. Measured by absolute frequency, it is commonest in Lithuania, the United States, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Kaselionis | Brazil, Lithuania, United States, Canada |