Nina (Asylum of the Daleks)

Nina was a girl whom Oswin Oswald fancied, or possibly even dated. Oswin stated that she was "going through a phase."

While shipwrecked on the ship Alaska in the Dalek Asylum, Oswin told Rory Williams about her, and began calling him "Nina," after her. (TV: Asylum of the Daleks)

Behind the Scenes
In TV: The Bells of Saint John, Angie stated that she was going to visit someone called Nina, although whether they are the same person (the "Nina" Oswin remembered being a muddled memory from her life on Earth) is unclear.