 Complete the following phrase:  The exact date of William Ross birth is unknown. He was described in 1394 as about twenty-three years old, which would place his birth year around 1370. The Ros family was an important one in Lincolnshire and Yorkshire, and the historian Chris Given-Wilson has described them as one of the greatest fourteenth-century baronial families to never receive an earldom. Ross father was Thomas Ros, 4th Baron Ros, who fought in the Hundred Years War under Edward III particularly in the 