Tallapaka Annamacharya was one of the finest composers to grace the Carnatic milieu, and as on date we have the sahityam of thousands of his compositions with us. He is a personal favourite of mine, especially with brilliant minds such as SK Dr. Pinakapani, Voleti Venkateswarlu and SK Nedunuri Krishnamurthy taking pains to set many of his kirtanams to tune. [I have attempted one myself, but it came out more like a padam than a kirtanam

]. We are said to have found the sahityam for these krithis inscribed in the famed copper plates, adorned with the name of the ragam but with no notations to guide us through their rendition. Some attempts have been made by the aforementioned vidwans to tune them in the ragams indicated, but for others we are left guessing.
I was recently browsing Mr. Ragde's index of Annamacharya sahityam on karnatik.com, and came across a series of ragas I am completely unaware of. What is even more surprising is that a lot of these ragams have a large number of compositions tuned in them. Some of these are (vide karnatik.com):
samantha
padi
ahirinata
telugukambhoji
malava (labelled as malavi - apparently an audava janya of Mayamalavagowla)
I have heard a rendition of Vishwanathena, a spurious MD creation in Samantha, and Sri Guruna Palitosmi, an authentic MD creation in Padi. Were these two different ragas altogether, since neither of them seem to lend themselves to much exploration in the modern context? Which of these other ragas have been mentioned in later periods?