From the Autodesk App Store:
The tool is designed to batch rename or modify family names inside Autodesk® Revit®.
This will facilitate the process of maintaining standard family names inside your project.
Please note: Application works for only loadable families.
About This Version
Version 1.0.0, 11/11/2016 – Initial Release
The Batch Rename Families 2017 add-in is brought to you by BIM SOFT SOLUTIONS. It's priced at 3.50 USD.
This add-in is available in the following versions:
There's more information available on the Autodesk App Store.