Five and Six
"Yes, contacted our mothers and offered them money if they would give up their rights so he could adopt us," Five explained. He wasn't going to try to get into the unusual circumstances around their births because he'd never managed to find out any information about the cause.
He frowned when she said that she didn't know if she had a different name. "Oh, there were seven of us," he said. "Ben died a long time ago though."