Biamorous

Biamory refers to someone who is non-monogamous and is only capable of feeling attraction towards or being in a relationship with exactly two individuals at a time. These two individuals could be of any gender, depending on the person's sexuality and romantic orientation.

History
The coiner of the term is unknown, however it has been used amongst the community since 2016.

Flag
The flag was coined by pride-color-schemes on tumblr. Its colors are a mix of the bisexual and polyamorous flag colors.