Shri Krishna’s various forms are described over the next four Shlokas. Krishna by the side of Radha, daughter of Vrishbhanu, shall be known as Radha Krishna.
Similarly, Krishna by the side of Rukshmani, daughter of King Bhishmaka, should be known as Laxmi Narayan. Vishnu Purana explains, ‘Laxmi took the form of Sita during Rama Avatara and as Rukshmani during Krishna Avatara.’