The von Vladimiroff (Russian: Владимиров) family are a cadet branch of the von Biron family, the last rulers of the Duchy of Courland and Semigalia (German: Kurland, Latvian: Kurzeme).
The family was founded by Neo-Aleksandr I von Valdimiroff, the issue of Yevdokiya Yusupova and Peter von Biron, although the pair officially had no children.
The faction are the last known pretenders to the Duchy of Courland and Semigalia.
The Duchess wrote about the child on very few occasions and expressed her loathing for him.
The Duke and third Duchess had the boy baptized as a Lutheran, but it infuriated his father and stepmother that he never renounced the Orthodox Church.