Need to add this somewhere: In classic Indo-European, associated with the late Khvalynsk culture (3900–3500), *dyeu also took the meaning of "Heaven", absent in Anatolian languages. [Anthony, David W. (2010-07-26). The Horse, the Wheel, and Language: How Bronze-Age Riders from the Eurasian Steppes Shaped the Modern World. Princeton University Press. pp. 78–79. ISBN 9781400831104.]