Last name Sillier (Sillier 
) , globally, is a very rare family name. The family name Sillier is habitual in France, where it is a very rare surname, Venezuela, where it is an extremely rare surname, and Canada. Much less frequently, Sillier is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sillier | Canada, France, Venezuela |
| otto sillier German trade unionist (1857–1925), DE (b. 1857) |
|