Bigender

Bigender is a nonbinary identity in which someone has two distinct gender identities. Bigender people can experience any two genders, including binary and non-binary genders. One or both of their genders could be fluid or fluctuating, in which case they may identify as genderflux or genderfluid.

History
One of the first recorded instances of bigender being used comes from a trans organization called the Human Outreach and Achievement Institute in the 1980s which defined "bigenderist" as a type of androgyne.