Ankle

The enby (non-binary) sibling of one’s parent; The enby spouse of a parent’s sibling; Any non-binary person, usually older, who is considered to be part of one’s family, without regard to relation by blood or marriage.
An amalgamation of “Aunt” and “Uncle”

Last night we had dinner with my Ankle Jacks and their new spouse, who is now my Ankle Rossie. We had word salad with mixed pronouns, family style.