[noufalibrahim]

They're quite different.

Ud-deen means of the religion. So, there are many names like Tajuddeen (crown of the religion), Shamsuddeen (Sun of the religion) and in this case, Muhiyyudeen (vivifier? of religion).

Mujahid is a person is a person who engages in jihad. The plural is Mujahideen (which is quite different when written in arabic but dramatically similar when transliterated into english). https://en.wiktionary.org/wiki/mujahid

[posterboy]

bold hypothesis: The bell was used as alarm for attacks of warriors, next to a bell for tsunami, storm, etc ... and a tsunami took the bells to the ocean. Very unlikely though that Arabic name would be used when the temple or whatever tried to resist the cultural invasion.

I wonder, what means Bak? Big?