Temengor - some people wrote it as Temenggor. You may ask the people of Temengor, they will lough like the elephant in Temengor's jungle loughed. The British came so far to Malaya. They didn't change the spelling of Temengor and we the Malaysian "gatal-gatal" changed it. And yet people follow step.
You may check with old maps of Perak or Malaya, if there is any word of Temenggor?
You can see this amazing lake at Temengor