The Honourable Gwilym Lloyd George (later 1st Viscount Tenby), MP for Pembrokeshire 1922-24 and 1929-50 and Newcastle upon Tyne North 1951-57, and sister Lady Megan Lloyd George, MP for Anglesey 1929-51 and Carmarthen 1957-66.
Keith Vaz, MP for Leicester East from 1987, and sister Valerie Vaz, MP for Walsall South from 2010.