I was replying to darkuser about south indian history, which reminded me that,

Tamil words do not end with "a" sound, they are often closed by "n", or "r" or "m" sound...

for example,

"Rama" has to be "Raman" or "Ramar"

so, Cholar, Cherar, Pandyar, and Pallavar, (as opposed to Chola, chera, pandya, and pallava...) and that "r" ending is for "respect".