Family name Bolth (Bolth 
) , globally, is a very rare last name. The family name Bolth is habitual in New Zealand, where it is a very rare surname, Australia, and Chile, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Australia, the United States, and New Zealand.
| VARIANT | COUNTRY |
|---|---|
| Bolth | New Zealand, Chile, United States, Australia |