A “nepo baby,” short for “nepotism baby,” is a buzzy, albeit condescending term that refers to children of celebrities who are now famous due partly to their parents’ fame.
Article source: https://www.huffingtonpost.co.uk/entry/tom-hanks-weighs-in-amid-nepo-babies-discourse_uk_63b9193ae4b0d6f0b9fb1e15