its a combination of family name like "Kazi Mustafa Hasan"
So now if you want to choose a initials name from this name in that case you have to choose first two word of the first two segmentation of the name, that is "Km" after that you can add the last portion of the name "hasan".
All together the initials name will be "Kmhasam"
This is the way you can set initials name of any other name. Example- John petter canady, initials- Jpcanady.