"Family rivalry" refers to a situation in which members of the same family compete against each other, often in a negative or contentious way. Full definition
Marco (Andretti) and Graham (Rahal) bring that classic family rivalry to the current days. (sbnation.com)
How family rivalry and the Catholic church helped miners devastate an indigenous Amazon territory (climatechangenews.com)
Mary Queen of Scots will take on the historical family rivalry between Elizabeth and Mary, when the latter attempted to overthrow her cousin's seat on the English thrown. (margoterobbie.com)