Siaosi, pronounced /ʃaˈoʊsi/, is an Oceanic male given name of Tongan origin. It means "God's gift" and is often used in Polynesian cultures, particularly in Tonga. The name Siaosi has a melodic sound that reflects the musicality and cultural richness of its origins. It comprises two parts: 'Sia' meaning God or lord, and 'Osi', meaning gift. This name offers parents an opportunity to bestow their child with a unique and meaningful moniker steeped in Polynesian tradition and spirituality.
The name Siaosi experienced varying popularity over the decades, with a notable peak in recent years. Between 2015 and 2023, there were consistently high numbers of babies named Siaosi, ranging from 7 to 13 births per year, with two peaks at 13 births in 2015 and 11 births in both 2022 and 2023. However, prior to this recent surge, the name's popularity fluctuated significantly; for instance, there were years with as few as 5 births (1995, 1998, 2002) and others with as many as 12 births (2009, 2010). Overall, since 1980, the name Siaosi has been given to a total of 289 newborns.