PartitionGuru can set and change volume names.
First select a partition that needs changing volume name, then click menu items "Partition" and "Set Volume Name" in turn, or right click the partition and on the popup menu select "Set Volume Name". Then PartitionGuru will show the following dialog box:
Enter a volume name you want to set or change, then click "OK".
For FAT32 partition, besides normal label, you can also set the BPB (DBR) Label saved in the DOS boot record.