Searching in the cataloge only by the rulers is tricky. You can go to the ‘Ruling Authorities’, type the issuer you want and just find the ruler in the list:


Alternatively, you can start in the ‘Catalogue’, type the issuer and in the filters, there is a drop-down menu with the list of the rulers:


The ÉH series (these: https://en.numista.com/literature/index.php?r=%C3%89remhat%C3%A1roz%C3%B3&t=&a=&c=) are available online, on Scribd. It's not the most up-to-date catalogue on medieval Hungarian coins, but it's better than nothing until you can get the book you've ordered.
Your coins are already on the site:
- N#74694, ÉH# 394
- N#51238, ÉH# 558
No need to add your images, but if you wish, you can add them as additional examples. Just scroll down the bottom of the coin page, to the ‘Register an example’ link.
