What country does Advocaat Liquor come from?

Advocaat or advocaten barrel is a traditional Dutch alcoholic beverage made from eggs, sugar, and brandy. Advocaat as the name of the drink, it is short for advocaten barrel, or "lawyer's drink". The Polish equivalent called ajerkoniak (de: Eier—eggs; fr: Cognac) is based on vodka instead of brandy, despite what the name may suggest.