Which preposition to use with athelstane

at Occurrences 1%

Ivanhoe and King Richard (who had followed Wilfred) hastened back to Coningsburgh, and Cedric, finding his project for the union of Rowena and Athelstane at an end by the mutual dissent of both parties, soon gave his consent to the marriage of his ward Rowena and his son Wilfred of Ivanhoe.

Which preposition to use with  athelstane