Many of us experience strange coincidences at some time in our lives.On 8th August 1820, a boat sank on the River Thames and there was only one survivor - his name was also Hugh Williams.On 5th December 1767, another boat sank in the same area and the only survivor was another man called Hugh Williams. They were both called Hugh Williams ) In the nineteenth century King Umberto I of Italy went to a small restaurant in Monza for dinner.) If you're travelling by boat, the luckiest name to have is Hugh Williams.On 5th December 1660, a boat sank near Dover, England.In 1965 a woman called Alice Blaise saved a four-year-old child from drowning in the sea.There was just one survivor - a man called Hugh Williams.A man and his uncle were the only survivors after a fishing boat sank out at sea.Perhaps when we're on holiday, thousands of miles from home, we suddenly see our neighbour on the beach.In fact, this type of coincidence is quite common, but there are some coincidences which are really incredible.Here are three of the strangest. 1) An unbelievable coincidence happened on a beach near Salem, USA.The boy's name was Roger Lausier.