Boris David Vladimirovich Duke of Rostov 
Boris David was born about 0982 in <,Rostov-Yaroslavski,Yaroslavski Oblast,Russia>.1 He died on July 24th, 1015.1
1 "Genealogical Research of Kirk Larson"
Further sources/citations:
"A History of Russia" @ p. 675, {European Heraldry #2 Crests by Arnaud Bunel}, {Larson: Genealogical Research of Kirk Larson}, "FamilySearch® Ancestral File™ v4.19"
Further sources/citations:
"A History of Russia" @ p. 675, {European Heraldry #2 Crests by Arnaud Bunel}, {Larson: Genealogical Research of Kirk Larson}, "FamilySearch® Ancestral File™ v4.19"
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