Helenus, Elenus, or Helenos (Ἕλενος) is a Greek name carried by various people:
Helenus (mythology), several people in Greek mythology Helenus, a Trojan soldier and prophet mentioned in the Iliad Helenus of Alexandria (painter), an ancient Greek painter Helenus of Alexandria (Cilicia), a bishop of Alexandria Scabiosa in Cilicia
Helenus of Heliopolis, a bishop of Heliopolis in Egypt Helenus of Tarsus, 3rd century, a bishop of Tarsus in Cilicia Helenus Milmo, an Irish lawyer in Britain and High Court judge. Helenus of Cyrene, Ptolemaic governor of Cyrene Helenus Scott, a Scottish physician Helenus (son of Pyrrhus), a prince of Epirus HelenOS, an operating system based on a multiserver microkernel design