Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Q: Peter Miller Cunningham was the fifth son of John Cunningham, land steward and farmer (1743--1800), and brother of Thomas Mounsey Cunningham (1776--1834) and of Allan Cunningham (1784--1842).
A: 
Who was the brother of Peter Miller Cunningham?