Infobox person
| name = Abu Sufyan ibn Harbأبو سفيان إبن حرب
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| birth_date = 567 CE
| birth_name = Sakhr ibn Harb ibn Umayya
| birth_place = Mecca, Hijaz, Arabia
| death_date =
| death_place = Medina, Hijaz, Rashidun Caliphate
| resting_place = Al-Baqi Cemetery, Medina
| spouse =
(among others)
| children = Sons:Daughters'':
| relatives =
| father = Harb ibn Umayya
| occupation = Major leader of the Quraysh tribe
| era = 624–630
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Sakhr ibn Harb ibn Umayya (صخر إبن حرب إبن أمية; 567—653), commonly known by his kunya'' Abu Sufyan (Abū Sufyān), was a prominent opponent turned companion of the Islamic prophet Muhammad. He was the father of the first Umayyad caliph Mu'awiya I (661-680) and namesake of the Sufyanid line of Umayyad caliphs which ruled from 661 to 684. He was a first-cousin-once-removed of the third Rashidun caliph Uthman; Abu Sufyan's uncle Abu al-As ibn Umayya was the grandfather of Uthman. Abu Sufyan was also a third-cousin of Prophet Muhammad; both men being great-great-grandsons of Abd Manaf ibn Qusai. One of his daughters, Ramla, was married to Muhammad, but this occurred before Abu Sufyan's own conversion and without his consent.
Abu Sufyan was a leader and merchant from the Quraysh tribe of Mecca. During his early career, he often led trade caravans to Syria. He had been among the main leaders of Meccan opposition to Muhammad, the prophet of Islam and member of the Quraysh, commanding the Meccans at the battles of Uhud and the Trench in 625 and 627 CE. However, when Muhammad entered Mecca in 630, he was among the first to submit and was given a stake in the nascent Muslim state, playing a role at the Battle of Hunayn and the subsequent destruction of the polytheistic sanctuary of al-Lat in Ta'if. After Muhammad's death, he may have been appointed as the governor of Najran by Caliph Abu Bakr (632-634) for an unspecified period. Abu Sufyan later played a supporting role in the Muslim army at the Battle of Yarmouk against the Byzantines in Syria.