4. Ben Youngs – son of Nick Youngs
Nick, who played for Bedford, Leicester Tigers and England, at Scrum-half, gained six England caps between 1983-1984. Youngs and his sons hold the rare distinction of all starting in test wins over New Zealand – Youngs starting at scrum-half in England’s 15-9 1983 win, and Ben (scrum-half) and Tom (hooker) in England’s 38-21 victory in 2012.