Genealogical Department, Medieval Family Histories Unit,
Address: 50 E. North Temple, Salt Lake City, Utah, Version: Ver
4.18 @ AFN=B1BM-MB

The cited information was published by July 1996 (c), data as of 2 January 1996, held in Family History Library (Ref: AFN=B1BM-MB)
Ancestral File, Medieval History Unit. 

• References (2)
  • Parent Source: Genealogical Department, Medieval Family Histories Unit,
    Address: 50 E. North Temple, Salt Lake City, Utah, Version: Ver
    4.18
  • Individual: Boris Yurevich, Duke of Belgorod