Danielis Lubockis was born on 30 January 1922 in Vilnius to the teacher Baruch and the nurse Meitė. He grew up with his brother Imanuelis and his younger sister Šulamit. In 1934, Danielis finished primary school in Vilnius and, in 1939, graduated from a humanitarian lyceum with excellent grades. From 1934, the rebellious youth was a member of illegal communist youth organisations (Pioneers and the Komsomol). He was arrested in 1937 but was soon released. In 1939, Danielis became a student in the Agronomy Faculty of the Vilnius Stephen Bathory University, but when the administration of the university changed and the faculty was eliminated, he attempted to enter the Agricultural Academy in Dotnuva. His application was rejected, but the persevering youth decided to continue his studies in a very different field. In 1939, he applied to study in the Philosophy Department of the Faculty of Humanities of Vilnius University. If that was not enough, in 1940, he applied to study philosophy and also chemistry in the Faculty of Mathematics and Natural Sciences. The active young man was allowed to study both specialities. However, Daniel did not finish the studies he had enjoyed so much: on 19 September 1941 he, like many other Jewish students, was expelled from the university on the basis of the Order of 17 September 1941 of the Higher Education Department of the Board of Education, which was subordinate to the Nazis and enforced their policies. In 1941, Danielis was imprisoned in the Vilnius Ghetto. For reasons unknown, from November 1941 to November 1942 he was in the ghetto prison, and in June 1943 he was again detained by the ghetto police. Soon after, in 1943, Danielis Lubockis was killed.