Johnson is the eldest of the four children of Stanley Johnson , a former Conservative MEP and employee of the European Commission and World Bank , and his first wife , painter Charlotte Fawcett ( later Wahl ) , the daughter of Sir James Fawcett , a prominent barrister and president of the European Commission of Human Rights . Johnson is the eldest of the four children of Stanley Johnson , a former Conservative Member of the European Parliament and employee of the European Commission and World Bank , and of his first wife , the painter Charlotte Fawcett ( later Wahl ) , the daughter of Sir James Fawcett , a barrister and president of the European Commission of Human Rights .