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.
He appears to have gained his medical abilities not through academic training, but was regarded as an accomplished physician. The surname "de Villula" first emerges in 1691 and does not reflect a contemporary name; it is thought to be the result of a mistaken reading of his name during his episcopal career.