James Kennedy, who was born in the year 1406, was appointed Bishop of Saint Andrews in the year 1440 and did much to turn the fortunes of the diocese round and in fact became one of the most outstanding prelates of Scotland .
Gilbert Kennedy was created Lord Kennedy in the years between 1452-57 there is a dispute about this date. He was also Regent to the infant James the third. In the year of 1509 Sir David the third Lord Kennedy, was created Earl of Cassillis, but unfortunately for him he died a few years later at the battle of Flodden, in the year 1503, many Scottish clans people died a savage and brutal death that day. The cream of Scotland 's upper-class clans people, were killed this day. From the years 1649 to 1651 the Lord Justice General of Scotland , was John Kennedy the sixth earl of Cassillis. Him and his son who would become the eighth earl were firm believers in the Protestant religion and backed Parliament during the civil war.
The Kennedy family stayed out of the Jacobite struggle years and were little heard of until they were all over.
The fifth Marques of Ailsa presented Culzean Castle to the National trust of Scotland , to enable future generations to appreciate the history and diverse cultures of the Scottish life style.