Rukhsana
Rukhsana means 'bright-faced' or 'radiant', from Persian roots related to rōšan/ros(h) meaning 'bright'.
Yes. It is cognate with Roshanak/Roxana, a historically attested Old Iranian name (Roxana is known from classical ancient sources). Rukhsana is its Persianate form used in later traditions.
No. Rukhsana is not a Quranic name; its origin is Persian and its attestations are literary and historical.
Common pronunciation is RUKH-sa-na, with the middle syllable lightly stressed: /rʊkˈsɑːnə/.
Variants include Rukhshana, Roxana (westernized), and Roshanak (older Persian form). Usage and spelling vary by language community.