What is the ruling on addressing "Abd al-Qadir" as "Qaddura" and "Abd al-Salam" as "Salluma," and what is the difference between the permissibility of addressing "Abd al-Aziz" as "Azzouzi" and the impermissibility of addressing "Abd al-Rahman" as "Rahmoun"?

It is not permissible to call 'Abd al-Rahman' as 'Rahmoon' because it is an alteration of Allah's name 'al-Rahman,' by which no one other than Allah the Almighty may be called. Musaylima the Liar dared to call himself 'Rahman al-Yamama,' thus earning the epithet of the Liar. Similarly, it is forbidden to name someone with names that are only befitting Allah, such as 'Quddus,' 'al-Barr,' 'Khaliq,' and 'Rahman.' It was mentioned that calling someone whose name is 'Abd al-Rahman' as 'Rahmoon,' or diminutive forms of names added to Allah's Beautiful Names, such as 'Ruhaim' or 'Kurayyim,' if done intentionally, is an act of disbelief (kufr). If it is not done intentionally, one is not judged as an infidel, and the listener should educate them.