The main name is actually hayrat it core aim is to revive the faith of Islam amongst the masses, by reminiscing its strong historical and cultural roots
Yes they decided to call the fountain and the well "hayrat", and the core aim is to do something good, doesn't have to have a "spreading Islamic zeal" component...
Some people like to do a good deed, just for the sake of doing good or making people happy, without any ulterior motive.
Anyways, thanks for bringing this to attention @NicNacCoin, glad to see a Turkish public good project in Bangladesh.