JOHN never found his lost sister, and he tried hard to find her. I think she doesn't know she's the sister of JOHN LENNON.
Oh, yes, she knows!
http://news.bbc.co.uk/1/hi/entertainment/157276.stmProviding copies of her birth and adoption certificates which say she was born Victoria Elizabeth Lennon, Ingrid Pedersen said she had kept her identity a secret for the sake of her adoptive parents, Margaret and Peder Pedersen.
'Time was right'
But Mrs Pedersen died five weeks ago so she had decided the time was right to speak out.
"I kept this secret for the sake of my mum. But now she's dead I want to find my real family," she said.
She added that revealing her true identity would "take a huge weight" of her shoulders.