Does laughing at the name of the Companion "Iyad ibn Himar," without intending to mock him, constitute mockery of the Companions and an act that expels one from the fold of Islam? And how does one repent from that? And does not listening to the teacher during the recitation of the Qur'an, talking with a colleague, and sometimes laughing, constitute an act that expels one from the fold of Islam? And how does one repent from that?

There is no sin upon you for what transpired, as it was an expression of surprise at the name, not mockery of the Companion. Scholars have explained the reason for such names, stating that the Arabs intended the good meanings inherent in them, such as the alertness of the dog and the patience of the donkey. Furthermore, failing to listen attentively to the Quran and instead engaging in conversation or laughter is neither disbelief nor an act that nullifies good deeds. You should be gentle with yourself and turn away from obsessive doubts.