Obaidallah bin Jahash al-Asadi

Source: http://en.wikipedia.org/wiki/Ubayd-Allah_ibn_Jahsh

• Martyred at Battle of Uhud, Medina.
• Wafaat: 3rd Shawwaal 3 AH (21st March 625 AD)

Source 1: http://en.wikipedia.org/wiki/Abd-Allah_ibn_Jahsh

Source 2: http://www.islamiska.org/e/jahsh.htm

Source 3: http://www.al-islam.org/restatement/24.htm

He was the son of Jahsh ibn Riyab[2] and Umama bint Abdulmuttalib,[3] hence a brother of Abd-Allah ibn Jahsh, Zaynab bint Jahsh, Abu Ahmad ibn Jahsh, Habiba bint Jahsh and Hammanah bint Jahsh, a first cousin of Islamic prophet Muhammad and Ali, and a nephew of Hamza ibn ‘Abd al-Muttalib. He married Ramlah bint Abi Sufyan (who was also known as Umm Habiba), and they had one daughter, Habibah bint Ubayd-Allah.

He and his wife became Muslims and, in order to escape from the Meccan persecution, they emigrated to Abyssinia. At Axum, part of the Aksumite Empire the Christian king, Aṣḥama ibn Abjar, gave sanctuary to the Muslims. There Ubayd-Allah eventually converted to Christianity and testified his new faith to the other Muslim refugees

Due to his conversion, he separated from his wife. He eventually died in Abyssinia in 627.

Later on Muhammad married his widow, Ramlah. Muhammad also married Ubayd-Allah's sister Zaynab.