Viliami ûUnakiûotonga Lalaka moe ûEiki Tukuûaho, Prince Ata (born 27 April 1988) is a member of the Tongan royal family and the younger son of Tupou VI, King of Tonga.
Ata is the son of Tupou VI, King of Tonga, and Queen Nanasipauûu Tukuûaho. He has two older siblings, Princess LÃÂtà «fuipeka Tukuûaho and Crown Prince Tupoutoûa ûUlukalala. He belongs to the line of succession to the Tongan throne and is not married. He was appointed to the title of Ata in September 2006.
He was educated at Canberra Grammar School in Australia.
In 2014, King Tupou VI sent Prime Minister Sialeûataongo Tuûivakanà  and a group of soldiers to a church in Haveluloto to prevent him from being baptized as a member of the Church of Jesus Christ of Latter-day Saints. The following year, he was baptised in the Church in a ceremony in Hawaii without his father's knowledge.