Mughira
Yes. Mughira is recorded in early Islamic biographical sources; the most prominent bearer is the companion Mughira ibn Shu'ba (مغيرة بن شعبة).
Linguistically it means 'attacker' or 'raider' — someone who makes a sudden assault. The sense comes from classical Arabic usage for sorties or raids.
No. Mughira does not appear in the Quranic text; attestations are found in hadith collections, biographical literature, and classical Arabic lexicons.
Yes, though it is rare and carries martial connotations. Families sometimes choose it for historical resonance; consider cultural context and local naming norms.
In Arabic the name is written مغيرة and pronounced approximately /muˈɣiːra/ (mu-GHI-rah).