Happy that it's working. Besides, it's not a bad suggestion, I would say. What do you think about posting a feature request on TJC ? I would like to hear the opinion of other people about this proposition.

If enough people approve, I'll submit a patch to Jolla and try to advocate for the change.

About how I find this, I've access to the email code through NDA. But it is in clear in QML anyway. The solution is based also on nemo-qml-plugin-email (see src/emailAccountListModel.h) which is Open Source and in the SailfishOS git repository.

To fully answer your question, the code you try to paste is from a delegate. So the displayName is an attribute of the model at a given index. It cannot be accessed out of the delegate. But nemo-qml-plugin-email provides accessors to the display name and some other attributes directly from the account id. The mailAccountListModel object I'm using, can be found in the email.qml file. It is a global object that is available in all the app.