Oppose.  There is a reason to use his name - it is the name of the person discussed in the article.  Emir is a generic title and titles aren't normally used to begin Wiki article titles about persons. Moreover, Abd al-Qadir is a common first name. A cursory glance of the history of Islamic states will reveal a lot of emirs, greater and lesser, named Abd al-Qadir.  What you are proposing is akin to renaming James I of England to simply King James, simply because some local things are named after him (e.g. King James Bible).  Finally, why do you spell it Abdelkader?  There is better reasons to use the transliterated Abd al-Qadir rather than Spanish/French spelling.