James Bertie, who would be the first Earl of Abingdon, was born in 1653. He was a younger son of the second Earl of Lindsey, so would not inherit the title. His mother Bridget, the earl’s second wife, was a descendant of an Earl of Berkshire, but that title had become extinct for lack of male heirs. However, the Earl of Berkshire had simultaneously held a barony which could descend through the female line. Thus, when Bridget died in 1657 the young James became the fifth Baron Norreys of Rycote.