Elias m. Hebrew אליהו 'Yahweh is God'. The most common medieval forms were influenced by Latin (H)elias, deriving from the Greek form Ἠλίας.
The name of a Biblical prophet and a 4th C martyr. Wycliffite Bible (1395): Elie.
The English diminutive Ellot and the vernacular forms Elis and Elys are witnessed in 1379 in the relational bynames Ellotsoñ (WRYPT1 p. 304), Elismañ (WRYPT1 p. 293), and Elyssoñ (WRYPT1 p. 298).