A benefit Shaykh Abu Amr al-Hajooree’s classes on science of hadeeth:
The four great sahaabahs by the name Abdullah who were from the ones that the people would return to for their knowledge since they lived in a time when many other great sahaabahs had passed away are:
1. Abdullah bin Umar
2. Abdullah bin Amr bin Al-‘Aass
3. Abdullah bin Abbas
4. Abdullah bin az-Zubair
And in total, there are over 200 sahaabahs by the name Abdullah.