1. Update manufacturer names for Magento?
To update a manufacturer, you should go to Settings -> Advanced Settings and assign a manufacturer attribute code for all attribute sets.
Please follow instructions:
1. Press [Settings]:
2. Open the [Advanced Settings] form:
3. Choose the attribute code "Manufacturer" for all attribute sets with the drop-down list opposite each position:
Once it is done, the manufacturer names will be updated during synchronization.