Clontarf Distillery is owned by the Castle Brands Inc who are based in New York. The actual distillery is in Dublin and produces the whole range of Clontarf Single Malts and blended whiskies. They also produce the Knappogue Castle Single Malt Whisky on top of their Clontarf Malts.
They have a very interesting website where more details about the Castle Brands can be found. Castle Brands deal with a wide range of Alcholoic drinks that are outside the range of this website