Mbongeni Theo Mbonambi (born 7 January 1991), known mononymously as Bongi, is a South African professional rugby union player.

He previously played for the Blue Bulls, making his senior debut during the 2012 Super Rugby season against the Crusaders in Pretoria.

Mbonambi was a member of the South Africa Under 20 team that competed in the 2011 IRB Junior World Championship.

[2] On 28 May 2016, Mbonambi was included in a 31-man South Africa squad for their three-test match series against a touring Ireland team.

In the semi-final match of the 2023 Rugby World Cup against England, Mbonambi was accused of making a racial slur against Tom Curry.