The prophet called Ruhullah, meaning “Spirit of God,” in Islamic tradition is Isa (Jesus).
The title reflects Qur’anic language describing Jesus as a spirit from Allah, especially in Qur’an 4:171, which calls him “a spirit from Him.” Islamic theology understands this expression as an honorific connected with Jesus’ miraculous creation and divine command, not as proof that Jesus is divine or part of a Trinity. The Qur’an also calls him the Messiah, a word of Allah, and a messenger.
Isa’s birth without a human father is compared in the Qur’an with Adam’s creation: both came into being through Allah’s command. He is also described as receiving the Injil (Gospel), performing miracles by Allah’s permission, and being strengthened by Ruh al-Qudus, commonly identified in Islamic commentary with the angel Gabriel.
A common mix-up is treating Ruhullah as equivalent to Christian claims about incarnation. Islam honors Isa as one of the greatest prophets while firmly maintaining that Allah is one and that Jesus is a created servant and messenger.