"Variant of George"
The name Siaosi is commonly a male name from the "Greek" origin.
Siaosi is the Samoan form of the name George, used for boys, and the identical form is also used in Tongan. It belongs to a group of European personal names taken into Samoan and Tongan through nineteenth-century missionary contact, in which names of this kind were fitted to Polynesian sound patterns.
George means "Farmer".
The pronunciation of Siaosi is see-OW-see.