Viliami Makamaile "Willie" Manu (born 20 March 1980) is a former Tonga international rugby league footballer.

He played as a second-row forward, he previously played in the National Rugby League for Australian clubs the Wests Tigers, South Sydney Rabbitohs, St. George Illawarra Dragons and the Sydney Roosters.

Manu moved to England and played in the Super League for the Castleford Tigers, Hull F.C.

[5] He played for Tonga in 2009 in a Test match against the New Zealand national rugby league team.

[6] St. Helens reached the 2014 Super League Grand Final and Manu was selected to play from the interchange bench in their 14–6 victory over the Wigan Warriors at Old Trafford.