Today is the Thirunakshatram of Sri MudhaliAndaan, a sishya of Sri Ramanujar. Here is a brief history of Sri MudhaliAndaan
Swami Mudaliandan was born in 1027 A.D at Pachhai Vaarana Perumal Sannidhi (referred to as “NazarethPettai” today) in Thondai mandalam, to Anandanarayana Dheekshidar and Nachiyaramman. Anandanarayana Dheekshidar did not have any children for a long time. He undertook a yatra to Thiruvengadam to worship Lord Thiruvengadamudayan and pray for a child. On his way at Thiruninravor, where he stayed overnight at Yeri Katha Ramar’s sannadhi, Sriramar (Anandanarayana Dheekshidar’s thiruvaradana perumal) appeared in his dream and instructed that he need not undertake yatra to Thiruvengadam for begetting a son as Thiruanandazvan(Adi Shesha, Five headed Serpent, on whom The Lord reclines ) has taken birth as Ramanujar in Sriperumbudur and that he (Lord) will be born as his son to serve Sri Ramanuja.
Ramanuja had a very intimate attachment towards Swami Mudaliandan which was expressed by Ramanuja himself many times. Even at the time when he embraced Sanyasa, Ramanuja renounced everything except Swami Mudaliandan, his priya Bagineyar. While going to kaveri for his daily bath, he used to lean on Dasarathi for support. One day, while on his way to the river, he was asked why, when he donned the robes of a Sannyaasin (a Pontiff) he did not give up Dasarathi, as that order demanded that all kith and kin should be renounced. To this Ramanuja replied that Dasarathi was an exception as he was his triplestaff (triTAndam) (the same reason he gave to Tirukkottiyur Nambi) and added “Just as a Pontiff cannot do without his triplestaff, I cannot do without Andaan”. Thus Andaan is referred to as a Triplestaf(TriTAndam) which is always found with a pontiff. Andaan had the privilege of having both Bodily relationship (Thega sambandam) and Spiritual relationship (Atma sambandam). Bodily relationship as Sri Ramanuja’s Bagineyar and Spritual relationship as a Servant of Sri Ramanuja.Written with reference from – http://www15.brinkster.com/mudaliandan/History.htm