He and his sister Christina Onassis were upset by his father's marriage to Jacqueline Kennedy, and he was credited with attempting to improve the relationship between his father and Stavros Niarchos.
كان هو وأخته كريستينا أوناسيس غاضبين من زواج والدهما من جاكلين كينيدي ، وكان له الفضل في محاولة تحسين العلاقة بين والده وستافروس نياركوس.