It was, after Haapai, the second island group of Tonga Tāufaāhau obtained in his way towards being king of all Tonga. It was therefore still in Vavau, in fact at Pouono, on 20 November 1839 that Tāufaāhau declared himself king of Tonga and ceded it then to the new Christian god.
It was, following Haapai, the second island group of Tonga that Tāufaāhau acquired on his path to becoming king over all Tonga. Thus, it remained in Vavau, specifically at Pouono, on 20 November 1839 when Tāufaāhau proclaimed himself king of Tonga and transferred it then to the new Christian deity.