yes, he can
Muhammad is actually a name and proper noun. It can be used beside any person whose name is Muhammad.
Either baptist or Muhammad
Yes he does.
Third Person
Kunya كنيةOften, a kunya referring to the person's first-born son is used as a substitute for the ism: for example, أبو كريم "Abu Karim" for "father of Karim", and أم كريم "Umm Karim", "mother of Karim". It can refer to the person's first-born son. The kunya precedes the ism when not replacing it.Nasab نسبThe nasab is a patronymic or series of patronymics. It indicates the person's heritage by the word ابن ibn(sometimes bin) which means "son", and bint, "daughter". Thus ابن خلدون Ibn Khaldun means "son of Khaldun" (Khaldun is the father's ism, or proper name). Several nasab can follow in a chain, to trace a person's ancestry backwards in time. This was important in the tribally based society of the ancient Arabs, both for purposes of identification and for social and political interaction. Laqab لقبThe laqab is intended as a description of the person. So, for example, in the name of the famous Abbasid Caliph Haroun al-Rashid (of A Thousand and One Nights fame), Haroun is the Arabic form for Aaron, and "al-Rashid" means "the righteous" or "the rightly-guided". Nisba نسبةThe nisba describes a person's occupation, geographic home area, or descent (tribe, family, etc). It will follow a family through several generations, and it is for example common to find people with the name al-miṣrī (the Egyptian, or rather "of Egypt") in many places in the Middle East, despite the fact that their families may have resided outside Egypt for several generations. The nisba, among the components of the Arabic name, perhaps most closely resembles the Western surname. abu-al-qasim Muhammad ibn abd allh ibn abd al-mut-alib Al hashimiFather-of-Qasim, Muhammad, son of Abdullah, son of Abdul Mutalib, the Hashimi"Abu -al- Qasim is a kunya, Muhammad is the person's proper name (ism), Abdullah is his father (a nasab), Abd -ul- Mutalib his grandfather (second-generation nasab) and "Hashim" is his family nisbaAnd Allah knows the best!
You choose a saint's name when you are baptized, and you may choose another saint's name when you are confirmed.
Sir Allama Muhammad Iqbal
Joseph Muhammad's birth name is Joseph Kadeem Muhammad.
Calvin Muhammad's birth name is Calvin Saleem Muhammad.
Muhammad Atif's birth name is Muhammad Atif Rasool.
A Persian physician named Muhammad ibn Zakariya ar-Razi.
The prophet Muhammad didn't change his name