William Keith, 2nd Earl Marischal (c. 1580–1623) was a Scottish nobleman known for his role in the {Scottish nobility}. He succeeded his father, {William Keith, 1st Earl Marischal}, and held the title during a time of political change in Scotland. His family was influential in the {Keith clan}, which played a significant part in Scottish history. As Earl Marischal, William was involved in various political and military affairs, including supporting the {Royalist} cause during the {Civil War}. He was also known for his connections with the {Stuart} monarchy, which helped solidify his family's status in Scotland.