Philo Judaeus De Mutatione Nominum 89

[89] Nor indeed does Joseph have any such need, he who is the president of the necessities of the body; for he also changes his name, being called Psonthomphanech by the king of the country. And what the meaning of these names is we must explain; the name Joseph, being interpreted, signifies "an addition." For things which are put by the side are an addition to those which exist by nature; for instance, gold, silver, possessions, revenues, the ministrations of servants, abundant treasure of heirlooms, and furniture, and other superfluities, and the infinite multitude of the different efficients of pleasure which some persons possess;