Complex sentence: Some Romanian scholars questioned the Latin origin of the names such as "Petre" found in the cave, but it actually is a derivative from the Greek "πέτρα" and of the name of "Saint Peter", which is widespread Christian name.
Split into simpler sentences: Some Romanian scholars questioned the Latin origin of the names such as "Petre" found in the cave. It is a derivative from the Greek "πέτρα" and of the name of "Saint Peter", which is widespread Christian name.