- With his Russian twin brother, owns a castle in France. They have both been accused of business misappropriations and of not paying their staff, questions they also deflect while maintaining that they have no interest in money.
- Died of Covid-19 six days after his twin brother Grichka died due to the same disease.
- Twin brother of Grichka Bogdanoff.
- His great-grandfather Boris Alexandrovich Bogdanov was shot to death in the Russian Revolution (1917).
- The Bogdanov twins were producers of a French science television show, Temps X, and authors of Dieu et la science [1991]. In 2002, some scientists suggested that the published scientific papers of the brothers were an elaborate hoax. Other scientists support the brothers.
- Son of Yuri Mikhailovich Bogdanov (b. Leningrad (now St. Petersburg), 28 Jan 1928) and wife Maria Dolores ("Maya") Kolowrat (b. Basle, 28 Feb 1926).
- His paternal grandfather Mikhail Borisovich Bogdanov was Russian.
- His paternal grandmother Anna Osten-Sacken was German.
- His maternal grandfather was Roland Wiltse Hayes (b. Curryville, Georgia, 8 Sep 1887, d. Boston, Massachusetts, 1 Jan 1977), a noted African American lyric tenor.
- His maternal grandmother was Bertha Henriette Katharina Nadine Gräfin von Kolowrat-Krakowský (b. Teinitzl (now Tynec nad Klatov, Czech Republic), 21 June 1890, d. Auch, 29 Jan 1982).
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