Are very different from the rest of the coins in the Ceylon section of Numista (the Dutch and British colonial issues), which are what I signed up to referee for. They deserve to be their own issuer in my opinion, as putting them with Sri Lanka would yield the same problem as I have now. No catalogue I have access to contains info on these coins, or houses them along with the colonial Ceylon coins.
There are various names for Ceylon and the kingdoms that issued those coins, such as the Kingdom of Jaffna (1215-1624), or the Kingdom of Kandy (1469-1815); so I think an umbrella term 'Sinhalese Kingdom(s)' would be most appropriate for this new issuer, until someone with greater knowledge of Sinhala coins can come along and become referee for Sri Lanka and this new issuer (I'm not letting Ceylon go, not after I spent hours getting the Tamil and Sinhala lettering on the colonial issues as accurate as I could