First used in 1670, the word nepotism, Latin for nepotis (nephew), was used to describe preferential treatment granted to relatives regardless of merit. Originally started as a practice by Catholic popes and bishops of the Middle Ages, who had taken vows of chastity, they regularly gave their nephews positions of partiality since they had no children of their own. Since then, not much has changed.
As with any other field, the arts are fraught with varying degrees of nepotism on a wide scale, here are 15 examples.