Lady Mary Chichester Peerage person ID=334773 Parents Arthur Chichester, 2nd Earl of Donegall Jane Itchingham Children Katherine Newcomen Sir Arthur Newcomen, 7th Baronet Siblings Edward Chichester Lady Jane Chichester John Chichester Arthur Chichester, 3rd Earl of Donegall Mary Rooth Elizabeth Rooth Partners Sir Robert Newcomen, 6th Baronet