(1) A common name both in Slavic regions (Ukraine, Russia and others) and in Israel. Its popularity in Israel probably stems from Israel's high population of Russian/ Ukrainian immigrants.
-- Originally a Greek name (derived from the name Ἑλένη – Helénē).
Can also be loosely translated from a Hebrew word 'Alon' referring to the oak tree.
(2) A name of a mountain in Greece.