Short answer: Since start of mankind
Long answer: As long as the Arabic language, along with its sister languages, Hebrew & Aramaic, have been around, Muslims have been there. 'Muslim' means, in Arabic, a submitter, referring to someone who submits their will to God. Anyone, in Islam, is considered a Muslim if they do this (many Muslims consider Christians and Jews as submitters also). Also, Muslims also consider any Old Testament prophet (Adam, Abraham, Moses, Noah, etc) as a Muslim, since they submitted to God's will and not their own. Usually, Muslims will regard anyone believing in the monotheistic God of Abraham as a Muslim.
So, in essence, Muslims existed before even Islam religion per Quran revelation to prophet Muhammad through the angel Gabriel that started in year 610 AD through year 632 AD (year of prophet Muhammad PBUH death)
They are called Namari in Urdu. In other languages different names are given to them.
Pope Urban II proclaimed the first crusade in 1095.
Muslims, or Moors
Muslims believe that the Kaaba was first built by Abraham, called Ibrahim in Arabic.
Muslims is the Arabic word for people who follow the religion of Islam.
Muslims. Not Mozlems or Moslems
They are called 'Sahaba' in Arabic that means the prophet Muhammad (PBUH) companions. However, per the universal sense of Islam Noah, Abraham, Moses, Jesus, and Muhammad (peace be upon them all) are the first Muslims.
They are followers of yazeed , they are not muslims but they called muslims their self .
The battle between the Muslims and the Franks was called the Battle of Tours.
Arabic/ Urudu/ Hindi word: morning. Muslims first prayer of the day is called subahi.
Sunni Muslims.
Muslims are practitioners of the religion called "Islam".