7 Zulkaedah 1433H, Sel.
The name Ishaq ( إِسْحَاقَ ) or Ishak is pronounced Is.haq, and not E.shak (E.shak as in solat Isyak).
You can look it up here...
Note that you'll need to be able to read Arabic.
By the way, the name Ishaq is the name of one of the 25 prophets mentioned in the Noble Quran.
Try listening the nasyid 25 Rasul by Raihan, around minute 0:46 here: