This is the 988th most frequent French word.
william
In French, "William" is a proper noun, equivalent to the English name "William." It is not a common noun with a specific meaning.
In this sentence, 'William' is a proper noun functioning as the subject of the sentence.
William est un étudiant brillant.
William is a brilliant student.
Here, 'William' is a proper noun used as the direct object of the verb 'rencontré'.
Nous avons rencontré William hier au parc.
We met William yesterday at the park.
In this context, 'William' is a proper noun used as the subject of the subordinate clause following 'que'.