Wazir
No. Wazir is not a personal name mentioned in the Quran; it is an Arabic title historically used for high officials.
Yes. Although originally a title, in some Muslim societies it has been adopted as a personal name, though it remains relatively uncommon.
It connotes responsibility, counsel, administrative duty and service in governance rather than hereditary nobility.
Yes. The term 'wazir' designates many historical officials (viziers) across Islamic history; specific bearers include numerous documented wazirs from Abbasid and Ottoman records.
Yes. The title and sometimes the name spread widely into Persianate, South Asian and other Muslim contexts as part of administrative vocabulary.