Osman Aga
Banned
How would that impact their ability to marry other European nobility? Would they be outcasts due to conversion, limited to other Muslim dynasties like the Ottomans or would they be forced to marry locals with noble lineage?
While it is unlikely they would marry European nobility, considering the change of religion, it is not impossible. If there is a noble willing to convert to gain the throne of x country, then there will also be a noble to marry his dsughter/sister/niece to that convert if he sees potential.
Europeans would be more or less pragmatic about it, depending on which throne he gains (Egypt, Persia having more value than Yemen, Tunis or Zanzibar for example).
But it is more likely to marry someone from the existing Muslim dynasties/nobility. In the late 19th century the Muslims were more willing to marry to with nobility outside their country. A convert would not be any different. Though it may differ. If the German Prince should become Shah of Persia, he will become Shia and the pool of brides is lesser. Not every Sunni is willing to enter such marriages. But if the German Prince were to take the throne of Egypt, he will become Sunni and his option of Muslim brides are far larger.