Capt. Reginald Winslow is the captain of the ESS Pale Rider.
From the Books: "“Position and velocity ideal, sir,” the pilot replied in his crisp English accent. Captain Reginald Winslow had come with the ship, it seemed. He’d immigrated to the US from Southern England as a young adult and quickly found his way into space." - Cartwright's Cavaliers, p. 45.