Mahmud Hisham al-Hennawi (محمود هشام محمد مصطفى الحناوي), also known by his kunya Abu Sahl, was an Islamic militant with ties to the Egyptian Islamic Jihad who was killed in Chechnya in 2005.
His older brother Ahmed Hani al-Hennawi was arrested in 1974 as a founding member of EIJ. Around 1980, al-Hennawi was arrested along with another brother named Hisham, again accused of complicity in the al-Jihad group.
In 1984, al-Hennawi moved to Jeddah, where he became a well-respected Saudi merchant. He later left to fight in the jihad against the Soviet invasion of Afghanistan, but upon returning to Saudi Arabia in 1993, was sought by authorities and so fled to Yemen, while Saudi security authorities deported his wife and children to Egypt.
He moved to the Sudan, but after an incident involving the sons of Ahmad Salama Mabruk and Mohammed Sharaf, was among the Arabs ordered to leave the country by the government so traveled to China where he again began working as a merchant until he felt Chinese authorities were seeking him, and so moved to Azerbaijan.
On December 1, 1996, al-Hennawi and Ahmad Salama Mabruk - both carrying false passports - accompanied Ayman al-Zawahiri on a trip to Chechnya, where they hoped to re-establish the faltering al-Jihad. Their leader was traveling under the name Abdullah Imam Mohammed Amin, and trading on his medical credentials for legitimacy. The group switched vehicles three times, but were arrested within hours of entering Russian territory and spent five months in a Makhachkala prison awaiting trial. The trio pleaded innocence, maintaining their disguise and having other al-Jihad members from Bavari-C send the Russian authorities pleas for leniency for their "merchant" colleagues who had been wrongly arrested; and Russian Member of Parliament Nadyr Khachiliev echoed the pleas for their speedy release as al-Jihad members Ibrahim Eidarous and Tharwat Salah Shehata traveled to Dagestan to plead for their release. Shehata received permission to visit the prisoners, and is believed to have smuggled them $3000 which was later confiscated from their cell, and to have given them a letter which the Russians didn't bother to translate.