Vahideh
Vahideh is the Persian form of the Arabic adjective wāḥidah, meaning 'unique' or 'single'. It is used in Persian-speaking Muslim communities.
No. Vahideh is derived from an Arabic adjective; it is not used as a proper name in the Qur'an.
In Arabic script it appears as 'وحيدة' and in Urdu/Persian script as 'واحدہ' or 'وحیده' depending on orthography.
Yes, the masculine counterpart is Wahid (Arabic: wāḥid), meaning 'one' or 'unique'.
It is relatively uncommon and considered more classical or reserved; popularity varies regionally in Iran, Afghanistan and among Persianate communities.