Correct

公国

/ gōng guó / 
Strokes

Definition

duchy/dukedom/principality

Example

As a Noun

duchy; dukedom; principality

1
Mónàgē
摩纳哥
gōngguó
公国

Principality of Monaco

2
Lúsēnbǎodàgōngguó
卢森堡大公国

Grand Duchy of Luxembourg