'O'ua
'O'ua is an island in Lulunga district, in the Ha'apai islands of Tonga. The location of the island is Latitude -20°1'59.99" & Longitude -174°41'0". There are also different forms of spelling for the name of the island, 'O'ua is just one of them.
Coordinates: 20°02′17″S 174°40′44″W / 20.038°S 174.679°W
References
1.'O'ua Island Geographical Information 2.