Name of coin

Wher is the source where I can clarified that name of Levon coins is double dram??

 … is double dram 

Is that the same as 2 Tram ? 

https://en.numista.com/catalogue/index.php?r=Levon&st=147-150-149&cat=y&im1=&im2=&ru=&ie=&no=&v=&cu=&a=&dg=&i=&b=&m=&f=&t=&t2=&w=&mt=&u=&c=&wi=&sw= 

Numista › Catalog › Crusader and Christian states in the Eastern Mediterranean › Cilician Armenia
2 Tram - Leo I 

N#49406