Explanation

• the literal meaning of zulnorain is Having two Lights
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• zulnorain titles of Hazrat Usman, the third Rightly Guided Caliph,
• who married two of Prophet Muhammad's daughters, viz. Hazrat Ruqaiyya and Hazrat Umm-e-Kulsoom
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• Zulnorain is the title of Usman (R.A).
• This title was given by Khadija (R.A).