You will be given a definition of a task first, then some input of the task.
Generate a correct and concise answer for the question based on the words in the context.

Context : Barbara Sidney, Countess of Leicester (1563 -- 24 May 1621) was a Welsh heiress, and the first wife of Robert Sidney, 1st Earl of Leicester.
Question : What is Barbara Sidney, Countess of Leicester's spouse's name?
Output:
Robert Sidney, 1st Earl of Leicester