This is the 6532nd most frequent Dutch word.
vanessa
"Vanessa" is not a Dutch word; it is a name.
In this sentence, 'Vanessa' is a proper noun, the name of a person, and it acts as the subject of the sentence.
Vanessa houdt van schilderen.
Vanessa loves painting.
Here, 'Vanessa' refers to the taxonomic genus of a butterfly species, indicating its scientific nomenclature.
De vlinder Vanessa atalanta wordt ook wel admiraalvlinder genoemd.
The butterfly Vanessa atalanta is also called the red admiral.
In this context, 'Vanessa' is again a proper noun as a name and indicates the giver in the prepositional phrase 'van' (from) Vanessa.