Dost
Yes. Dost is a Persian word used historically as a name element and standalone name across Persianate and South-Central Asian Muslim contexts; it appears in compound names like Dost Muhammad.
Dost comes from Persian (دوست) and means 'friend' or 'companion'.
No. Dost is not a Quranic name. It is a lexical Persian name aligned with Islamic virtues but not cited as a Quranic proper name.
Yes. The meaning is positive (friend/companion) and historically used by Muslim families; it does not conflict with Islamic naming principles.
Pronounced /dost/. In Persian/Urdu script it is دوست. Arabic equivalents of the meaning include صديق (sadiq).