Family name Boislard (Boislard 
) , in the world, is a rare cognomen. The family name Boislard is characteristic of Canada, where it is a rare surname, New Zealand, and Switzerland. Measured by absolute frequency, it is commonest in Canada, France, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Boislard | Canada, France, New Zealand, United States, Switzerland |