Final answer:
Tenages, known for his scientific skills, was the Heliad murdered by his envious brothers Actis, Triopas, Macar, and Candalus in Greek mythology.
Step-by-step explanation:
The man who was one of the Heliadae and was murdered by his brothers Actis, Triopas, Macar, and Candalus, due to their envy of his skills at science, was Tenages. This story comes from ancient Greek mythology, more precisely from the traditions surrounding the island of Rhodes and its historical narratives. The Heliadae were the children of Helios, the sun god, and Rhodos. Tenages was renowned for his scientific prowess, which ultimately led to his untimely death at the hands of his own siblings.