Caelumgender is a xenogender related to anything in the sky. This could mean a general gender connected to the sky as a whole, or a gender connected to a specific aspect of the sky.
Caelumgender was coined on November 9, 2018 by Tumblr user Ostereigender via Beyond-MOGAI-Pride-Flags.
The caelumgender flag was designed by Wikia FANDOM user Reign of the breadsticcs (Chasing Rainbowss) on March 10, 2021. The color meanings are currently unknown.
The first alternate flag was designed by an anonymous Wikia FANDOM user on March 10, 2021 with inspiration from Kxttyjvn's comment on the LGBTA Wikia article for this term. The color meanings are the following: Three dark shades of blue at the top for nighttime sky and the upper atmosphere, White in the close middle for clouds and the sun, Two shades of gray in the middle for (storm) clouds, and lighter shades of blue for daytime and lower atmosphere.
The second alternate flag was designed by Wikia FANDOM user Nothoughtsnogender on April 9, 2021. The colours are supposed to represent the sky.