"Nepotistic" Natural Recordings by Native Speakers
Nepotistic refers to favoritism shown to relatives or friends, often to the detriment of others. It can also describe behavior that is biased or unfair because of personal relationships, rather than objective qualifications or merit.
I apologize, but there seems to be a mistake in the word you provided. "Nepotal" is not a valid English word.
Without a basis in merit or skill, but rather due to a family relationship or connection.