At first they'll have the same name, such as "Audioengine [Product]". Some devices (most computers and Android devices for example) can rename devices once you're paired to them to make it easier to tell them apart when choosing which one to connect to.  With an iOS device we have not found a yet to rename devices. 

It is worth noting that renaming the device in the streaming source will only change the way that particular source recognizes the Audioengine device; there isn't a way to change the way the it will show up on new devices, so any new device will always see it as "Audioengine [Product]."