▁Dak ot ah ▁( S ante e ▁Si oux ) ▁chief ▁of ▁French ▁and ▁Dak ota ▁ancest ry . ▁East man ▁was ▁re ass igned ▁from ▁Fort ▁Sn elling ▁in ▁ 1 8 3 2 , ▁soon ▁after ▁the ▁birth ▁of ▁their ▁daughter ▁Win ona ▁( mean ing ▁First - born ▁daughter ). ▁He ▁declared ▁his ▁marriage ▁ended ▁when ▁he ▁was ▁re ass igned , ▁as ▁was ▁typical ▁of ▁many ▁European - American ▁men ▁who ▁abandoned ▁Indian ▁women ▁and ▁their ▁children . ▁His ▁daughter ▁Win ona ▁was ▁also ▁called ▁Mary ▁Nancy ▁East man . ▁Later ▁she ▁was ▁named ▁W ak ant ak aw in ▁in ▁the ▁Si oux ▁tradition ▁of ▁mark ing ▁life ▁pass ages . ▁ ▁She ▁married ▁a ▁S ante e ▁Si oux ▁and ▁had ▁five ▁children , ▁dying ▁at ▁the ▁birth ▁of ▁the ▁young est , ▁later ▁known ▁as ▁Charles . ▁ ▁After ▁adopt ing ▁Christian ity , ▁her ▁husband ▁and ▁two ▁of ▁their ▁surv iving ▁sons ▁took ▁the ▁East man ▁surname . ▁Win ona ' s ▁el dest ▁son ▁Rev . ▁John ▁( Mar pi y aw aku ▁K ida ) ▁East man ▁became ▁a ▁Pres by ter ian ▁mission ary ▁at ▁Fland re au , ▁South ▁Dak ota . ▁ ▁Her ▁second ▁son ▁Dr . ▁Charles ▁East man ▁was ▁the ▁first ▁Native ▁American ▁cert ified ▁as ▁a ▁medical ▁doctor , ▁after ▁ear ning ▁his ▁degree ▁at ▁Boston ▁University . ▁He ▁married ▁a ▁European - American ▁woman , ▁Ela ine ▁Good ale , ▁and ▁later ▁worked ▁for ▁Native ▁American