James Earl Hamilton Marsden, 1st Earl of Arran, was the son of James Hamilton, 1st Lord Hamilton, and Mary Stewart, daughter of King James II of Scotland. He served as sheriff of Lanark, was pivotal in Scottish naval operations, and was instrumental in negotiating royal marriages, notably that of King James IV to Margaret Tudor. His political career included opposition to various factions during the reign of King James V, facing challenges in both personal and political realms, especially regarding his marriages and legitimacy of heirs.