William Ker, 2nd Earl of Roxburghe

William Ker, 2nd Earl of Roxburghe (1622 – 2 July 1675) was the grandson of Robert Ker, 1st Earl of Roxburghe. He was born William Drummond, the youngest son of John Drummond, 2nd Earl of Perth, and Jean Ker, daughter of Robert. On Robert's death in 1650 he had no surviving male heirs, consequently his titles and estates passed by special arrangement, ratified by Parliament, to William. He subsequently changed his name to Ker, and married his cousin, also called Jean Ker.

His son Robert inherited his titles on his death in 1675.