My favourite is my Great x24 Grandfather: William Marshal, reputedly the greatest knight that ever lived, who rose from obscurity to serve four kings and become one of the most powerful men in Europe, tournament legend, eventually appointed a Regent of England, 1st Earl of Pembroke, and bacame a Knight Templar on his deathbed, and is buried in the Temple Church in London, and clearly was quite a bloke! He had ten children and I am descended (as no doubt are many thousands) from his daughter Eva who married William de Braose, through my maternal great Grandmother's line.
Paul