From a medieval vernacular form of Elias, in use as a given name in northern England from the 14th century onwards. In modern use it is often a transferred use of the surname derived from this name. In Wales it is now often taken as an Anglicized form of the Old Welsh name Elisud. It has enjoyed considerable popularity in recent times, having also been taken up as a girl's name.
Scottish: 1. Anglicized form of Gaelic Mac Iain Uidhir ‘son of sallow John’. This form is associated mainly with Ross-shire. 2. Anglicized form of Gaelic Mac an Oighre ‘son of the heir’. This form is associated mainly with Perthshire. 3. Anglicized form of Gaelic Mac an Mhaoir ‘son of the steward or keeper’. The same name in Ireland was commonly Anglicized as Weir.