Wiktor was the eldest son of Henrieta (née Rapaport) (1846–1918) and Karl Brillant from Tarnopol, then a part of Poland. Wiktor's sister Dora Brillant was born in 1881.
Wiktor married Laura Brillant (née Sturmlauf)  on August 28, 1904 at Przemysl. They had four sons. Karol-Ludwig, also a pharmacist, was born in 1905 and was killed by the Nazis in 1942. Maximillian, an electrical engineer, was born in 1906 and immigrated to Palestine in 1934. Yohanan-Yan was born in 1914, served in the Anders-Army, and came to Palestine in 1942. Edmond Wilhelm was born in 1916, emigrated to Palestine in 1936, and became a naval architect. After serving in the British Royal Navy in World War II, Edmund became one of the founding fathers of the Israeli Navy. The family residence was at May-3 street in Jaroslaw.
Wiktor earned a M.Sc degree in pharmaceutics. In 1928 he opened a pharmacy at 16 Grunwaldzka Street in Jaroslaw. The name of his pharmacy was "Pod Czarnym Psem" (Polish for "The Black Dog"). In 1908, he won a gold medal in a show in Berlin, and took third place with bronze medal at an industrial exhibition held at the Jaroslaw park now known as the Park of Heroes of Monte Cassino.
World War II
In World War II, Wiktor was taken as a hostage by the Nazis. Since he was a prominent Jew, he appeared as the first in the hostages list. He was robbed by the Nazis and was deported with his wife Laura and two sons Karol and Yohanan across the River San to the Soviet side. They moved to Tarnopol to the home of Laura's sister, Bronislava Hefter. In Tranopol, Wiktor opened a pharmacy. In 1942 Wiktor, Laura and Karol were killed by the Nazis after their deportation to Zloczow.
- "HISTORIA APTEK JAROSŁAWSKICH Wiktor Brillant Pharmacy in Jaroslaw a Research about pre WW2 pharmacies in Polish" (PDF). dr n.farm. ZBIGNIEW BILIŃSKI in Polish. 2008. Retrieved April 9, 2009.
- "Galicja i jej Aptekarze Wiktor Brillant Pharmacy in Jaroslaw a Research about pre WW2 pharmacies in Polish" (PDF). Podkarpacka Okr´gowa Izba Aptekarskaw Rzeszowie dr n. farm. Aleksander Czarniawy in Polish. 2010. Retrieved May 30, 2011.
- "Wiktor Brillant". Yad Vashem Holocaust Memorial Center Israel. Retrieved 10 May 2013.
- "Laura Brillant". Yad Vashem Holocaust Memorial Center Israel. Retrieved 10 May 2013.
- "Karol Brillant". Yad Vashem Holocaust Memorial Center Israel. Retrieved 10 May 2013.