"End of the Spear" is a movie based on the true story of five American missionaries who were killed by the Waodani tribe in Ecuador in 1956. The main characters in the film are:
* Nate Saint: The leader of the missionary group
* Jim Elliot: One of the missionaries
* Roger Youderian: One of the missionaries
* Ed McCully: One of the missionaries
* Pete Fleming: One of the missionaries
The Waodani tribe is prominently featured in the film, but there is no individual character named "Waengongi". It's possible you may have misheard or misremembered the name.