In 1898, Sofia Vassilyevna Kokoulina moved from Irkutsk to St. Petersburg to enrol in the conservatory. In 1902, Dmitri Boleslavovich Shostakovich began working as senior verification officer at the Chamber of Measures and Weights in St. Petersburg. On 12 February 1903, D.B. Shostakovich and S.V. Kokoulina were married. On 12 November 1903, their daughter Maria was born, and on 25 September 1906, their son Dimitri (this was how his name was entered in the register).
“I was born on Septermber 25, 1906 in Leningrad into the family of Dmitrii Boleslavovich Shostakovich, Chief Inspector at the Board of Weights and Measures.”