He seems to have learned his medical skills not in a school, but was considered a skilled doctor. The name "de Villula" first appears in 1691, and is not a contemporary name. It resulted from a misreading of John's name in his episcopal profession.
John de Villula's medical abilities seem to have been acquired through practical experience rather than formal education. His name "de Villula" first emerges in 1691, but this was likely due to an error in transcription from his original name, which he held during his episcopal career.