Hi Prospery,
Greetings from Syncfusion support.
To display foreign key column values in Grid, we suggest you to refer the below documentation.
Please refer the below documentation for binding complex valued columns in Grid.
And also we suggest you to refer the below documentations for more details regarding the ways of binding data to Grid.
Please get back to us if you need further assistance.
Regards,
Renjith Singh Rajendran