Change name of GPT Partition (not label) under Windows from command line

A partition name is a name given in the GPT; it's external to the partition itself. It is set when the GPT is created (automatically under Windows). A partition label is a string stored inside the filesystem; for example with ext-family filesystems, NTFS or FAT; this is the label you can manipulate with label/e2label etc.

The is no (supported) way to manipulated the GPT name under windows (directly). Under Linux it's done with

tune2fs -L vmguest_root /dev/sda1

tune2fs for Windows does not support changing the GPT name; it just supports chaning the feature bits of ext partitions.

Windows supports changing the label, not the name. Normally, the name of created GPT partitions should match the volume GUID.