Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Christian von Steven (Russian - Khristian Khristianovich Steven; 19 Jenụwarị 1781, na Fredrikshamn, Finland <unk> 30 Eprel 1863, na Simferopol, Crimea) bụ onye Russia amụrụ na Finland na onye na-ahụ maka ihe ọkụkụ.  Ajụjụ: Olee mgbe von Steven nwụrụ?
30 Eprel 1863