Al-Hafidz Abu Bakar Abdullah bin Muhammad bin Ubaid bin Sufyan bin Qais al-Baghdadi al-Umawi al-Qurasyi (Arab: الحافظ أبو بكر، عبد الله بن محمد بن عبيد بن سفيان بن قيس البغدادي الأموي القرشي) (lahir 823 di Bagdad, meninggal 894 di Bagdad) atau lebih dikenal dengan Ibnu Abi ad-Dunya adalah seorang ulama dibidang hadis dan fikih. Berikut ini beberapa guru Ibnu Abi ad-Dunya: Abu Dunya Muhammad bin Ubaid, ayahnya, Ahmad bin Ibrahim al-Maushuli, Ahmad bin Ibrahim ad-Durqi, Ali bin al-Ja'd, Ibrahim bin al-Mundzir al-Hizami, Khalaf bin Hisyam al-Bazzar, Zuhair bin Harb, Abdullah bin Aun al-Kharraz, Suraij bin Yunus, Sa'id bin Sulaiman al-Wasithi, Kanil bin Thalhah al-Jahdari, Manshur bin Abi Muzahim, Abu Ubaid al-Qasim bin Sallam, Abu al-Ahwash Muhammad bin Hayyan al-Baghawi, Muhammad bin Sa'ad, Sekretaris al-Waqidi, Daud bin Rasyid, al-Hasan bin Hammad Sajjadah, Bukhari, Abu Dawud
Berikut ini beberapa murid Ibnu Abi ad-Dunya : Ibnu Majah, Ibrahim bin al-Junaid, Al-Harits bin Abi Usamah, Abdurrahman bin Abi Hatim, Abu Ali bin Khuzaimah, Abu al-Abbas bin 'Uqdah, Abdullah bin Ismail bin Buraih al-Hasyimi, Abu Basyar ad-Dulabi, Muhammad bin Khalaf Waki', Abu Ja'far bin al-Bakhtari, Abu Bakar Muhammad bin Ahmad bin Khunais, Abu Sahl bin Ziyad al-Qathan, Muhammad bin Yahya bin Sulaiman al-Marwazi, Abu Bakar Ahmad bin Marwan ad-Dainuri, Ali bin al-Faraj bin Abi Rauh al-'Akbari, Abu Bakar an-Najjad, Abu Bakar Muhammad bin Abdullah bin Ibrahim asy-Syafi'i
Karya tulis : Al-Mausu'ah, Al-Adab, Akhbar Dhaigham, Al-Anwar, Akhbar al-Muluk, Al-Alhan, Akhbar ats-Tsauri, Al-Alawiyyah, Akhbar Uwais, Akhbar Mu'awiyyah, Akhbar al-A'rab, Al-Adhhiyyah, Inzal al-Hajjah Billah, Akhbar Quraisy, A'lam an-Nubuwwah, I'tha` as-Sa`il, Inqilab az-Zaman, At-Tasyamus, A'qab as-Surur wa al-Ahzan wa al-Baka`, At-Ta'azi, Al-Jihad, Tarikh al-Khulafa`, Al-Jafa` `inda al-Maut, At-Tarikh, Al-Jiran, Taghayyur al-Ikhwan, Al-Hadzar wa asy-Syafaqah, Taghayyur az-Zaman, Hilmu al-Hukama`, Ar-Ru`ya, Huruf Halaf, Al-Khulafa`, Al-Khafiqin, Al-Khabaz, Al-Khatim, Ad-Din wa al-Wafa`, Dzammu al-Hasad, Dzammu adh-Dhahik, Dzammu al-Faqr, Dzammu ar-Riya`, Adz-Dzikr, Ar-Ruhban, Ar-Raha`in,
Ar-Rahn, Ar-Ramy, Az-Zuhd, Az-Zafir, As-Sunnah, As-Sakha`, Ash-Shadaqah, Syaraf al-Faqr, Ash-Shalatu 'ala an-Nabi S.A.W, Ath-Thabaqat, Shifatu an-Nabi S.A.W', Al-'Azza, Al-'Abbad, Al-'Ilm, Al-'Audz, Asyura, Al-'Idain, Al-'Afwu, Atha`u as-Sa`il, Fadhlu al-'Asyr, Fadhlu al-'Abbas, Al-Fatawa, Fadhlu Lailaahaillallah, Fadhlu 'Ali, Fadha`ilu al-Qur'an, Al-Fawa`id, Al-Qishash, Maqtal Utsman, Maqtal al-Husain, Maqtal Ibnu az-Zubair, Maqtal Thalhah, Al-Majus, Al-Mamlukin, Al-Muntazhim, Al-Maghazi, Al-Manasik, An-Nawadir, Al-Ma'isyah, Al-Hadaya, Al-Washaya, Al-Waqf wa al-Ibtida`
