Sinterklaas or Sint-Nicolaas is a legendary figure based on Saint Nicholas, patron saint of children.
A leprechaun is a type of fairy of the Aos Sí in Irish folklore. They are usually depicted as little bearded men, wearing a coat and hat, who partake in mischief. They are solitary creatures who spend their time making and mending shoes and have a hidden pot of gold at the end of the rainbow.
A pot of gold at the end of the rainbow - a pot full of St. Patrick's Day wishes.