Batternis is a demon appearing in the Sacred Magic of Abramelin the Mage. The demon’s name originates from the word meaning “to use vain repetitions” and thus may be interpreted “the Babbler. Batternis serves demon Magoth. In other Abramelin material the name may be spelled Batirmiss and Batrinas. A.G.H.
Belanger, Michelle. The Dictionary of Demon: Names of the Damneds. Llewellen Publications. 2010. ebook.