I have left the issuer as Ramanathapuram and moved it under Hindu Dynasties as you suggested.
The ruler “Sethupathis of Ramanathapuram” has also been created.
If I understand the history correctly, the Sethupathis of Ramanathapuram received their authority from the Nayaks of Madurai.
In Numista, we keep the issuer at the lowest level possible, so we keep the issuer Ramanathapuram.
Separately, I will set up rulers for Madurai since we have coins from several different dynasties.