Do you know the rule ism Jallallah?

Question
Do you know the rule ism Jallallah?
Answer
It appears you are referring to the rules for pronouncing the Glorious name of Allah with tafkheem (heaviness) or tarqeeq (lightness) on the laam.
You can find the rules for this at the following link: http://www.abouttajweed.com/tafkheem-and-tarqeeq/tafkheem-and-tarqeeq-part-2.html.  Please scroll down a bit to the section entitled:

The lam of the name of The Majesty