By the New Kingdom (16th century to 11th century BC) he was less prominent than other gods with lunar connections, Thoth and Khonsu. As a result of the functional connection between them, he could be identified with either of those deities.
Iah was sometimes considered an adult form of Khonsu and was increasingly absorbed by him. He continued to appear in amulets and occasional other representations, similar to Khonsu in appearance, with the same lunar symbols on his head and occasionally the same tight garments. He differed in usually wearing a full wig instead of a child's sidelock, and sometimes the Atef topped by another symbol.[4] As time went on, Iah also became Iah-Djehuty, meaning "god of the new moon".[5] In this role, he assumed the lunar aspect of Thoth (also known as Djehuty), who was the god of knowledge, writing and calculation. The segments of the moon were also used as fractional symbols in writing.[6]
Iah was also assimilated with Osiris, god of the dead, perhaps because, in its monthly cycle, the Moon appears to renew itself.
^Coulter, Charles Russell; Turner, Patricia (4 July 2013). Encyclopedia of Ancient Deities. Routledge. p. 3. ISBN978-1-135-96397-2. Aa (Mesopotamia): Also known as: Aah, Aos, Iah, Khensu, Sirdu, Sirrida. Aa as a Chaldean deity was known as Aos. Her emblem is a disk with eight rays. As the Akkadian and Sumerian moon god- dess she is the consort of the sun god, Shamash. In this aspect, she is the mother of Tammuz. Ra, in Egypt was called Aa (the sun), as a high or sky god. Aa or Aah is another name for the Egyptian moon god, Khensu.
^Wilkinson, Richard H. (2003). The Complete Gods and Goddesses of Ancient Egypt. Thames & Hudson. p. 111
^Remler, Pat. (2000). Egyptian Mythology A to Z: A Young Reader's Companion. Facts On File. p. 1.
^S. Quirke and A.J. Spencer, The British Museum Book of Ancient Egypt. London, The British Museum Press, 1992
