Interesting. It's been months since I've played with the Linux version, and I avoid Macs like the centralized plague that they are (but my daughters use them.) On my Windows PCs Electrum always defaults to "wallet_1" as the name for the first wallet created.
Whenever you launch Electrum for the first time the default name proposed is "default_wallet".

then, if you create a new wallet or restore an old one the default name proposed will be "default_1", "default_2" and so on
