In fact you are able to set custom names for these references:
1. After adding new relationship you could select the generated property from the visual designer;
2. Press F4
to open the Properties Window
3. Set the property’s name using the Name
4. Save the diagram and rebuild the solution;
I am afraid that after removing an association all the metadata about it is removed and there is no way to restore it at a later stage.
Hope that helps.
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items