Answer

I know of one widely recognized Ratnaprabhasūri in Jain tradition—the ācārya mentioned in Jain lineage literature and listed among Jain monks. From the sources I found, this appears to be a single historical figure, not multiple distinct Ratnaprabhasūris. ( wisdomlib.org)

Explanation

The name appears in Jain lineage records such as the Bṛhadgaccha-gurvāvalī, and reference lists treat “Ratnaprabhasuri” as one entry/name. ( wisdomlib.org)

Takeaway

So the safest answer is: one well-known Ratnaprabhasūri. ( wisdomlib.org)