Giving undue favours to ones own kith and kin is called nepotism. This term is commonly used nowadays in bollywood where it is heard that kids of filmstars get advantage in their launch in the industry. Though nepotism is there in all fields where the person in the present authority favours his/her relatives to get any renouned position or work done. It is also called favouritism, where the favour is given to the known of the authority.