I've been toying with what the coins in the fantasy game should be called I've come up with the following which is quite satisfying.
|Atlantian platinum coinage.|
Copper pieces = Copper Pence
Silver pieces = Silver Shillings
Electrum pieces = Electrum Electors
Gold pieces = Golden Crowns
Platinum pieces = Platinum Paragons
What I like about this is it captures a sense of the setting; Clearly Electors, the Crown and the Paragons are important and this speaks to elements of the setting, namely religion and the royalty and that's just the type of thing you want in my opinion.