III, Duke of Saxe-Coburg-Saalfeld (later Ernest I, Duke of Saxe-Coburg and Gotha) and his first wife Princess Louise of Saxe-Gotha-Altenburg. He was soon joined by a brother, Prince Albert, who would later become the husband of Queen Victoria. Though Duke Ernest fathered numerous children in various affairs, the two boys would have no other legitimate siblings. In 1826, their father succeeded as Ernest I, Duke of Saxe-Coburg and Gotha through an exchange of territories after the death of the duke's uncle, Frederick IV, Duke of Saxe-Gotha-Altenburg. There are various accounts of Ernest's childhood. When he was fourteen months old, a servant commented that Ernest "runs around like a weasel. He is teething and as cross as a little badger from impatience and liveliness. He is not pretty now, except his beautiful black eyes." In May 1820, his mother described Ernest as "very big for his age, as well as intelligent. His big black eyes are full of spirit and vivacity." Biographer Richard Hough writes that "even from their infancy, it was plainly evident that the elder son took after his father, in character and appearance, while Albert strongly resembled his mother in most respects." Ernest and his brother often lived with their grandmother the Dowager Duchess of Saxe-Coburg-Saalfeld until her death in 1831. He and Albert were brought up and educated together as if they were twins. Though Albert was fourteen months younger, he surpassed Ernest intellectually. According to their tutor, "they went hand-in-hand in all things, whether at work or at play. Engaging in the same pursuits, sharing the same joys and the same sorrows, they were bound to each other by no common feelings of mutual love". Perhaps the aforementioned "sorrows" related to their parents' marriage; it was not happy, and Duke Ernest I was continually unfaithful. In 1824, Ernest I and Louise divorced; she subsequently left Coburg and was disallowed from seeing her sons again. She soon remarried to Alexander von Hanstein, Count of Pölzig and Beiersdorf, dying in 1831 at the age of thirty. The year after her death, their father married his niece Duchess Marie of Württemberg, who was his sister Antoinette's daughter. Their stepmother was thus also their first cousin. The duke and his new duchess were not close, and would produce no children; while the boys formed a happy relationship with their stepmother, Marie had little to no input in her stepsons' lives.