Dear Brandon, Thanks for your inquiry. I was talking to my father about the history. Tennakoon's roots go back to Kandy. Accorind to my father, his ancestors has worked for King Sri Wickrama Rajasinghe (The last king of Kandy before the British took over the country). The king also sent him to scort Robert Knox an english sailor who captured by the king. He eventually betrayed the king and escaped to Anuradhapura.
Please doo keep in touch. I am going to do some more research on this topic.