Bespregender is a Xenogender which is related to ones own, custom religion (as opposed to an established, widespread religion).
History
The term Bespregender was coined by tumblr user pupyzu[1] on May 28th, 2021. The flag was created on the same day. It has no confirmed meaning.
The alternative Bespregender flag was coined by wiki user Namira-07 (sheogorath#9023 on Discord) on August 13, 2022.