<human>: Aleksandr Isayevich Solzhenitsyn (; 11 December 1918 - 3 August 2008) was a Russian novelist, historian, and short story writer. He was an outspoken critic of the Soviet Union and communism and helped to raise global awareness of its Gulag forced labor camp system. He was allowed to publish only one work in the Soviet Union, One Day in the Life of Ivan Denisovich (1962), in the periodical Novy Mir.

Solzhenitsyn was born in Kislovodsk, RSFSR (now in Stavropol Krai, Russia). His mother, Taisiya Zakharovna (nee Shcherbak) was of Ukrainian descent. Her father had risen from humble beginnings to become a wealthy landowner, acquiring a large estate in the Kuban region in the northern foothills of the Caucasus. During World War I, Taisiya went to Moscow to study. While there she met and married Isaakiy Solzhenitsyn, a young officer in the Imperial Russian Army of Cossack origins and fellow native of the Caucasus region. The family background of his parents is vividly brought to life in the opening chapters of August 1914, and in the later Red Wheel novels.  In 1918, Taisia became pregnant with Aleksandr. On 15 June, shortly after her pregnancy was confirmed, Isaakiy was killed in a hunting accident. Aleksandr was raised by his widowed mother and aunt in lowly circumstances. His earliest years coincided with the Russian Civil War. By 1930 the family property had been turned into a collective farm. Later, Solzhenitsyn recalled that his mother had fought for survival and that they had to keep his father's background in the old Imperial Army a secret. His educated mother (who never remarried) encouraged his literary and scientific learnings and raised him in the Russian Orthodox faith; she died in 1944.  As early as 1936, Solzhenitsyn began developing the characters and concepts for a planned epic work on World War I and the Russian Revolution. This eventually led to the novel August 1914; some of the chapters he wrote then still survive. Solzhenitsyn studied mathematics at Rostov State University. At the same time he took correspondence courses from the Moscow Institute of Philosophy, Literature and History, at this time heavily ideological in scope. As he himself makes clear, he did not question the state ideology or the superiority of the Soviet Union until he spent time in the camps. CANNOTANSWER

Using a quote from the above article, answer the following question: did he have any siblings?
<bot>: On 15 June, shortly after her pregnancy was confirmed, Isaakiy was killed in a hunting accident.