1 5 ▁March ▁ 1 9 7 5 ), ▁commonly ▁called ▁Ari ▁or ▁Ar isto ▁On ass is , ▁was ▁a ▁Greek ▁sh ipping ▁magn ate ▁who ▁am ass ed ▁the ▁world ' s ▁largest ▁priv ately ▁owned ▁sh ipping ▁fleet ▁and ▁was ▁one ▁of ▁the ▁world ' s ▁rich est ▁and ▁most ▁famous ▁men . ▁He ▁was ▁known ▁for ▁his ▁business ▁success , ▁his ▁great ▁wealth ▁and ▁also ▁his ▁personal ▁life , ▁including ▁his ▁marriage ▁to ▁Ath ina ▁Mary ▁Liv anos ▁( d augh ter ▁of ▁sh ipping ▁ty co on ▁St av ros ▁G . ▁Liv anos ). ▁He ▁was ▁also ▁known ▁for ▁his ▁affair ▁with ▁famous ▁opera ▁singer ▁Maria ▁Call as ▁and ▁his ▁ 1 9 6 8 ▁marriage ▁to ▁Jac qu eline ▁Kennedy , ▁the ▁wid ow ▁of ▁American ▁President ▁John ▁F . ▁Kennedy . ▁ ▁On ass is ▁was ▁born ▁in ▁S my r na ▁( mod ern - day ▁ İ z mir ▁in ▁Turkey ) ▁and ▁fled ▁the ▁city ▁with ▁his ▁family ▁to ▁Greece ▁in ▁ 1 9 2 2 ▁in ▁the ▁w ake ▁of ▁the ▁Gre co - T urk ish ▁War . ▁He ▁moved ▁to ▁Argentina ▁in ▁ 1 9 2 3 ▁and ▁established ▁himself ▁as ▁a ▁to b acco ▁tr ader ▁and ▁later ▁a ▁sh ipping ▁owner ▁during ▁the ▁Second ▁World ▁War . ▁Mov ing ▁to ▁Mon aco , ▁On ass is ▁fought ▁Prince ▁Rain ier ▁III ▁for ▁economic ▁control ▁of ▁the ▁country ▁through ▁his ▁ownership ▁of ▁S B M ▁and ▁its ▁Monte