Her first single was (aptly) "Mrs. Lennon"

Usage examples of ono.

Beatles were not even aware that this partnership document existed until Klein found it, but in any case, these clauses in the partnership agreement had been regularly broken, mostly by John, who had performed with the Plastic Ono Band and released several albums with Yoko.

That year Bryan Robertson pioneered Pop Art at the huge space of the Whitechapel Art Gallery and the Fluxus Group, including Yoko Ono, were shown at Gallery One.