2) My father also telling to add ahmed in the end. So, SYED ABU BAKAR AHMED, SYED HUZAIFAH AHMED, SYED ZAKARIYYA AHMED etc.
In both the cases let me know it is correct or not, also please suggest.
بسم الله الرحمن الرحيم
You may add SYED and AHMAD before and after the names. All the names you proposed are fine. You may keep any of these names for your baby boy.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.