Ginerva. A form of Guenivere, isn't it? King Arthur's wife. But she loved Lancelot.
If I am Guenivere, Harry must be King Arthur. He's everyone's hero, having just defeated Voldemort. We're dating. It fits.
I'm Guenivere. There's a Lancelot too. He's not what you'd expect as Lancelot. He's definitely not Arthur/Harry's best friend. In fact, to Arthur/Harry and my brothers, he's more like Mordred.
Guenivere. Ginerva. King Arthur's wife. Harry Potter's girlfriend. Lover of Sir Lancelot. Lover of Draco Malfoy.