[2] Laghu Bhaskariya Vyakhya, a mathematical commentary composed in the court of king Ravi Kulasekhara in 869/70 AD, mentions a Chera Perumal royal called Rama Deva, who marched out to fight the enemies on getting information from the spies.

[12] Rama Deva is described as a member of the Solar Dynasty ("ravi-kula-pati") in Chapter IIII, Laghu Bhaskariya Vyakhya.

[11] Vasubhatta, the famous Yamaka poet of medieval Kerala, names his patron king as "Rama" in his Tripuradahana and Saurikathodaya.

[7] Tripuradahana refers to Rama Rajasekhara as follows:[7] There ruled a king who was bowed to by poets, the sight of whose army scattered his enemy kings, who was as steady in punishing the wicked as ready in succouring the righteous, whose conduct was above calumny, who was extolled as the foremost of kings (rajasekhara = Siva) in being wealthy (bhutidhara = a smearer of ashes) in having proboscis-like arms (vyala-pati-sphurat-karam = serpent entwined arms) and in bestowing wealth upon the supplicants at his feet, who was considered as an incarnation of Rama himself in the sameness of his name, with the hero of the Ramayana and in (the identity of purpose) raksopayam (protection of his subjects: danger to Raksasas).

[7] Modern scholars generally consider this a result of confusion on the part of the commentators (between Sthanu Ravi Kulasekhara and Rama Rajasekhara) who were separated in time from the Perumals.