Okay, so the Prince Wilhelm of the title is the future Emperor Wilhelm I of Germany. He was heir presumptive to the Prussian throne so long as his older brother, King Friedrich Wilhelm IV, remained without an heir.
However, Elisa and Wilhelm were strung along for five years in a vain hope that the marriage would be allowed, before Friedrich Wilhelm III ordered his son to give up the Polish girl.
If Friedrich Wilhelm were to have male issue, would this be enough to allow a Wilhelm-Elisa marriage? And if so, what would the repercussions of this be? Obviously, Wilhelm and Elisa's marriage would be morganatic, which means any children would be excluded from the Prussian succession, but what else?
William was the heir presumptive to the Prussian throne. His eldest brother, Prince Frederick William, was childless, and it was expected that William would eventually inherit the throne. Because of this, he was also expected to marry a princess within his rank and have children. Unfortunately, Elisa was not that princess. Although her mother was a Prussian princess by birth, she descended into her husband's rank as a mere Polish noble. Thus, Elisa was considered to be not royal enough to marry the heir to the Prussian throne.
However, Elisa and Wilhelm were strung along for five years in a vain hope that the marriage would be allowed, before Friedrich Wilhelm III ordered his son to give up the Polish girl.
If Friedrich Wilhelm were to have male issue, would this be enough to allow a Wilhelm-Elisa marriage? And if so, what would the repercussions of this be? Obviously, Wilhelm and Elisa's marriage would be morganatic, which means any children would be excluded from the Prussian succession, but what else?