Suhayb
No. Suhayb is not mentioned in the Quran; he is known from sirah and hadith literature as Suhayb ibn Sinan al-Rumi, a Companion (Sahabi) of the Prophet ﷺ.
Literally it describes a tawny or reddish-brown coloration; the word functions as a descriptive epithet in Arabic lexical usage.
Yes. Suhayb ibn Sinan al-Rumi is a historically attested Companion whose life and migration are recorded in classical biographical sources and hadith literature.
Yes. It is historically rooted and rare; families often choose it to honor the Sahaba and early Islamic history, though it is less common than many other companion names.
Suhayb is traditionally masculine; there are no established feminine equivalents in classical Arabic naming practice.