Thank you for the wonderful translation! You really make so many things clear. 
I’m not from Iran but Turkey and I have to say, their last names are weird as hell:
“Pasha”  is a title for high ranking government officals and soldiers who are higher than a colonel, for example Mustafa Kemal Pasha can be translated as General Mustafa Kemal. 
It’s basically creating a Japanese character and giving them “Senpai” as a last name. 
Stepmother’s Marchen is by far my favorite manhwa and muslim country setting seems waaaay better than any other manhwa, I really appreciate the effort despite this little mistake.