Alagas is a demon appearing in Mathers' translation of the Sacred Magic of Abramelin the Mage. The demonic name means "the Wanderer." Alagas is among a host of spirits serving the demonic princes of the four cardinal directions Oriens, Paimon, Ariton, and Amaimon. He is invoked as a part of starting the conversation with the Holy Guardian Angel. A.G.H.
Belanger, Michelle. The Dictionary of Demon: Names of the Damneds. Llewellen Publications. 2010. ebook.