Complex sentence: Udayar has sometimes spelt as Udayar or Odayar whom has the people of the chola dynasty and cholas are now calling as udayar mentioning the whole as parkavakulam community.
Split into simpler sentences: Udayar has sometimes spelt as Udayar or Odayar. They are the people of the chola dynasty and cholas were now called as udayar mentioning the whole as parkavakulam community.