Knappogue Castle Irish Whiskey is a brand of premium single malt Irish whiskey produced by Castle Brands Inc. It is one of the few independent bottlings of Irish whiskey currently available on the market. The brand is named for historic Knappogue Castle in County Clare, Ireland, originally built by Clan MacNamara in 1467. Knappogue Castle is known for bottling one of the oldest and rarest known Irish whiskies, Knappogue Castle 1951, a pot still whiskey produced at the now-defunct B. Daly Distillery