From the Autodesk App Store:
Opening families one by one, creating family parameters, and saving and loading in a project can be a long process. This tool can help you avoid all these tasks by automatically reusing existing family parameters.
“Transfer Family Parameters” is simple, easy and fast. Simply select parameters from a family loaded in an Autodesk® Revit® Project, then select families to add these parameters and click ok. Copied parameter names can be renamed if needed.