[loeg]

QEMU itself came from Bellard originally, but I believe you are correct that the RO and RW vvfat support came from Johannes Schindelin:

https://github.com/qemu/qemu/commit/de167e416fa3d6e4bbdcac90...

https://github.com/qemu/qemu/commit/a046433a161a1f554be55df8...