Arigender

 Not to be confused with Aresgender. Arigender, also known as Ariesgender is a zodiacgender based on the constellation Aries. It is described as an unfathomable gender that does not fit under any labels. It is a complicated gender identity that cannot be explained or is very hard to explain.

History
Arigender was coined on or before August 25, 2014 by tumblr user transtrendlng via MOGAI-Archive.

Flag
The first flag was created on or before August 28, 2015 by unknown. The second flag was created on August 29, 2015 by Pride-Flags on Deviantart. The colors are there to represent the Greek god of war, Aries, which is generally associated with warm colors and shades of red.

Resources

 * 1) https://www.deviantart.com/pride-flags/art/Arigender-1-556785045
 * 2) http://archive.is/vNm84#selection-1547.12-1553.15
 * 3) http://archive.is/tH27G#selection-1863.11-1869.15