While "Lutetia" itself is not a common English word, it is sometimes used in English to refer to:
* The ancient city of Paris: You might find it in historical contexts or archaeological studies.
* Asteroids: There is an asteroid named (21) Lutetia, discovered in 1852.
Therefore, while "Lutetia" doesn't have a direct English translation, its meaning is clear – a place of mud and marshes.