"The drawing commonly referred to as “LAM” has been thought for decades to be a drawing of an entity Aleister Crowley contacted around 1918."
https://ac2012.com/2012/10/20/lam-i-am/
"Lam was an Entity contacted by Aleister Crowley.
In 1918 Crowley conducted a sex magic ritual called the Almalantrah working with Roddie Minor, known as Soror Ahitha. The working created a portal in the spaces between stars, through which Lam was able to enter the known physical universe."
https://occult-world.com/lam/
"Eventually Crowley made contact with an entity known as Lam and drew its portrait, and damn if it doesn’t look like the pictures we see of Grays now"
https://www.vice.com/en/article/mvpvyn/magickal-stories-lam
"The now famous drawing of LAM eventually found its way into the hands of Kenneth Grant, disputed, and exiled, leader of the OTO following Crowley’s death."
http://www.educatinghumanity.com/2013/01/Alien-Contact-Aleister-Crowley-Lam-.html?m=1