Count Geoffrey Plantagenet was a notable figure in medieval history, born around 1113. He was the son of Henry I of England and Matilda, the daughter of Henry I. Geoffrey became the Count of Anjou and was known for his political acumen and military skills, which helped him expand his territories. Geoffrey married Constance of Brittany, and they had several children, including Richard the Lionheart and King John of England. His lineage played a crucial role in the establishment of the Plantagenet dynasty, which ruled England for several centuries, significantly influencing the country's history and governance.