Surname Gillett-Spio (Gillett-Spio 
) , globally, is an extremely rare family name. The family name Gillett-Spio is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Gillett.
| VARIANT | COUNTRY |
|---|---|
| Gillett-Spio | United States |