An Englishman an Irishman and a Scotsman were in a pub, talking about their sons. 

"My son was born on St George's Day," commented the Englishman. "So we obviously decided to call him George." 

"That's a real coincidence," remarked the Scot. "My son was born on St Andrew's Day, so obviously we decided to call him Andrew." 

"That's incredible, what a coincidence," said the Irishman. "Exactly the same thing happened with my son Pancake."