Thomas Gral was born in Nitra, Slovakia, in 1925. His mother, Helena, was a concert pianist who had studied in Vienna and Brno, while his father, Viliam, was a lawyer who attended Charles University. As Nitra was a large town situated close to Vienna and Budapest, Thomas grew up speaking Slovak, German and Hungarian, and he has early memories of visiting the two cosmopolitan cities. After elementary school, Thomas attended a classical gymnázium in Nitra.
Following the invasion of Czechoslovakia by Hitler and the split of the country into the Protectorate of Bohemia and Moravia and the nominally-independent First Slovak State, Thomas’s life changed drastically. Although he and his parents were baptized Christians, they were ethnically Jewish and, therefore, were subject to the discrimination forced upon Jews. In September 1944, Thomas was deported to Auschwitz where he lost almost his entire family. He was liberated from Gleiwitz in February 1945 and he says that his relatively short stint in the camp was what saved him, as he had already lost an extreme amount of weight due to little food and hard labor.
Thomas made his way home to Nitra where he was reunited with his father, who had gone into hiding during the Slovak Uprising and had later been captured and sent to a POW camp. In the fall of 1945, Thomas started studying medicine at Comenius University in Bratislava. After a previerka, Thomas was asked to finish his studies at the Košice campus of Comenius University and so he moved with his wife and infant daughter. When he received his degree in 1951, he worked in internal medicine at the university.
In the aftermath of the Slánský trials, Thomas’s father was arrested due to his politics and friendships with Vladimir Clementis and Eugen Loebl, among others. Thomas himself lost his job at the university and spent two years in the army. Thomas and his family (which now included his son) moved to Bratislava in the early 1960s. In 1964, he was able to secure a one-year fellowship in a research institute at Loyola University Chicago. Although his family had stayed behind in Czechoslovakia, Thomas was able to extend his fellowship for several years and he settled in Los Angeles. His wife was visiting during the 1968 Soviet-led invasion and upon returning to Europe met their children in Vienna (who had visas thanks to the help of Thomas’s father). By that time Thomas had a green card and was able to bring them to the United States. His wife returned to Czechoslovakia to care for her father and the two eventually divorced.
Thomas was a member of the Los Angeles chapter of the Czechoslovak Society of Arts and Sciences (SVU), which he says was relatively active at the time. He received his American citizenship in 1974. Following the fall of communism, Thomas frequently returned to his homeland, teaching during summers. He also started a foundation in Hradec Králové dedicated to fighting intolerance. In his retirement, Thomas moved to the Miami area where he has given lectures at the American Czech-Slovak Cultural Club. Today he lives in Sunny Isles Beach, Florida.