He is married to Eleanor Bruce.
They got married
Child(ren):
http://clancunninghamintl.org/history2.htm
X. Sir William Cuninghame of Kilmaurs. He appears in several records, as in 1350, 1354 and 1364. He married Eleanor Bruce countess of Carrick; and in her right was created Earl of Carrick; by this lady he had no issue; by a former marriage he had three sons. His third son, Thomas, was ancestor of the Cunninghames of Caprington. The eldest son predeceased him, without issue. He was succeeded by the second son,
The data shown has no sources.