Harith ibn Harb was the son of the 7th century Arabian Mecca

Mecca

Mecca is a city in the Hijaz and the capital of Makkah province in Saudi Arabia. The city is located inland from Jeddah in a narrow valley at a height of above sea level...

n leader Harb ibn Umayya, thus he was also the brother of Abu Sufyan ibn Harb

Abu Sufyan ibn Harb

Sakhr ibn Harb , more commonly known as Abu Sufyan was a leading man of the Quraish of Mecca. He was a staunch opponent of the Islamic prophet Muhammad before accepting Islam later in his life.-Opposition to Islam:...

, the man who would be Muhammad's arch enemy, but adopt Islam after the Conquest of Mecca

Conquest of Mecca

Mecca was conquered by the Muslims in January 630 AD .-Background:In 628 the Meccan tribe of Quraysh and the Muslim community in Medina signed a 10 year truce called the Treaty of Hudaybiyyah....

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He had trade relations with Sa'd ibn Ubadah

Sa'd ibn Ubadah

Sa'd ibn Ubadah ibn Dulaim was one of the prominent Sahabah and Ansar, the chief of the Banu Khazraj.He participated in the secret second pledge at al-Aqabah. It was not after that the Medinan pilgrims had left the city, that the Meccans became aware of the meeting at Aqabah. They pursued the...

, the chief of the Banu Khazraj

Banu Khazraj

-Early history:Abu Muhammad Al-hasan Ibn Ahmad Al-hamdani mentioned that The Banu Khazraj along with Banu Aws settled the area of Yathrib around the 2nd century ad as part of the PreIslamic Exodus of Yemen due to the Great Dam damage....

 and Harith helped Sa'd when the later was captured by the Meccans after the Second pledged at al-Aqabah.

Saffiyah bint ‘Abd al-Muttalib, one of Muhammad's paternal aunts, was the wife of Harith ibn Harb. She then married Awwam ibn Khuwaylid

Awwam ibn Khuwaylid

This person is among the Sahaba's ancestorsAwwam ibn Khuwaylid from the Banu Asad.His sister was Khadijah bint Khuwaylid, and his father was Khuwaylid ibn Asad....

, for whom she bore Zubayr ibn al-Awwam.