This is the 6895th most frequent French word.
louis
A French gold coin or monetary unit used from the 17th to 19th centuries.
In this sentence, 'Louis' refers to a proper noun, the name of a person.
Louis est un garçon très intelligent.
Louis is a very intelligent boy.
Here, 'Louis' identifies a historical figure, specifically King Louis XIV.
L'histoire du roi Louis XIV m'intéresse beaucoup.
The story of King Louis XIV interests me greatly.
In this case, 'louis' refers to a historical object, an established name for a type of coin.