The ancient Slavic personal name Gorislav has its roots in medieval records of a Ukrainian oikonym located in the Mostysk district of the Lviv region, specifically in the village of Gorislavichi. This name is also mentioned in Polish sources under the name Horzisławicze, dating back to 1475.The modern Ukrainian surname Horislavets, which can be found in the Poltava region, is also connected to this name. Researcher H. Hynken believes that the ancient Ukrainian form of the name Gorislav originated in the 9th century.In 1584, another version of the oikonym Horyslawicze was recorded. In the city of Lutsk during the interwar years, there were several successful attempts to revive the use of the rare Slavic name Gorislav.