Alec Douglas-Home
Home's name and title changed a few times during his life. Born as Alexander Frederick Douglas-Home, he became Lord Dunglass when his father became the Earl of Home. Dunglass is a junior title, that is, a lower title which is held by the eldest son. When his father died Alec became the 14th Earl of Home. He also became Baron Douglas in the peerage of the United Kingdom (that was also a junior title).