Manzur
Yes. Manzur is attested in historical onomastics and appears in patronymics and scholarly names (e.g., forms like Ibn Manzur) and has long use in Persianate and Urdu-speaking contexts.
In Arabic and Urdu Manzur (منظور) means 'accepted', 'approved', or 'desired'. It derives from the root related to seeing and being regarded.
Common pronunciations in South Asian usage are /man-ZOOR/ or /man-ZUR/. The variant Manzoor is pronounced similarly and is more frequent.
Yes. Manzur and its variant Manzoor are used among Urdu-speaking Muslims and in Persianate cultural areas; Manzur as a spelling is less common and thus relatively rare.
No. Manzur as a proper name does not appear in the Quran; the lexical root ن-ظ-ر appears in various forms across Arabic literature but Manzur is an anthroponym derived from standard vocabulary.