It is unknown when panamorous was coined, however it appears to have been used amongst the community since 2016.
The panamorous flag was created by NonMonoPrideFlags on December 7, 2015. It is a mashup of the pansexual and polyamory flags. The circle in the middle symbolizes love regardless of sexual orientation or gender.
An alternate panamorous flag was created by FANDOM user Thingamabon on June 2 of 2021. The red stripe represents love. Pink represents compassion. Yellow represents harmony and happiness. Green represents healing and hope. Blue represents trust. The white circle represents unity.