This is a very inportant pasuram of Thirumangai Alwar
here Thirumangai Alawar Details how Rama accepted every one http://www.kamakoti.org/tamil/divya146.htm 1. 1418 - accepting Guhan as brother 1419 - markadam - Monkey - sugreevan - accepted him as his relative
The author's painstakingly- given quotes from other Tamil texts on the Ikshvaku lineage of Cholan kings have been vindicated by the inscriptions of Thiruvalankaadu Copper plates.
Cholas and Rama shared the same ancestors until Mandhatha. After him the lineage bifurcated. Rama came in the lineage of the eldest son while Sibi came in the lineage of the other sibling. Chola Varman was the founder of Cholan dynasty. He was the descendant of Sibi and from him earned the name Sembian. Many Verses are there in Purananuru to substantiate this. One of the following posts form my blog contains the link to the ASI page on the inscriptions of the copper plates.