Living memory, the three or four generations that people generally know about. The schoolyard 'I'm 25% Portugese', meaning 'one of my grandparents is Portugese

Living memory, the three or four generations that people generally know about. The schoolyard 'I'm 25% Portugese', meaning 'one of my grandparents is Portugese, but the others and parents were born here'. It would be tedious to say 'well I can't offer you a percentage, because I only know about a few generations of my family history, but as far back as I know everyone has been born in the UK'.