Family name Sian Anthony (Sian Anthony 
) , across the world, is an extremely rare last name. The last name Sian Anthony is characteristic of South-eastern Asia, particularly Philippines, where it is an extremely rare surname. More prevalently, Sian Anthony is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sian Anthony | Philippines |
Alipe, and Siachongco