What is the ruling on naming with names mentioned in the the Qur’an, such as "Sundus," "Istabraq," and "Afnan," knowing that they are rare in Islamic history?

The fundamental principle regarding the naming of children is permissibility, unless the name contains a religious prohibition. This includes names that imply servitude to other than Allah, glorify disbelievers or transgressors, promote corrupt beliefs, or encourage blameworthy morals.

It is not a prerequisite for names to be permissible that they are commonly known or inherited, though the best names are Abdullah and Abdurrahman.

Furthermore, names that involve self-glorification or self-praise should be avoided, in accordance with the Almighty’s saying: ﴿So do not purify yourselves; He is most knowing of who is righteous.﴾ [An-Najm:32]. This is also based on the Prophet's (peace be upon him) prohibition of naming a boy Rabah, Najih, Yasar, or Aflah.