Do not combine dissimilar names with split authors.
There are several authors named Philostratus. Flavius Philostratus wrote the Life of Apollonius of Tyana, the Lives of the Sophists. Philostratus the Elder (who may perhaps be the same man, but probably isn't) wrote a book of descriptions of paintings, the Images, as did his relative Philostratus the Younger. It is probably best to put combined books under Flavius Philostratus or (where Flavius Philostratus is not an author) under the Elder Philostratus