Hi David,
Thank you for contacting Syncfusion support.
In our AutoComplete control, filtering can be made based on the “DisplayMemberPath” property. As DisplayMemberPath holds the value of a property in a class, AutoCompletion cannot be done using multiple properties of the same class. This is the default behavior of AutoComplete control.
Please let us know, if we misunderstood your query.
Regards,
Keerthana J.