Family name Baltuonis (Baltuonis 
) , globally, is a rare surname. The family name Baltuonis is habitual in Lithuania, where it is quite a rare surname, Canada, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Baltuonis | United Kingdom, Canada, Lithuania |
| juozas baltuonis BY (b. 1910) |
|
|
| steponas baltuonis (b. 1956) |
|
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| vladas baltuonis (b. 1959) |
|