Peerage of England
The ranks of the English peerage are, in descending order, Duke, Marquess, Earl, Viscount, and Baron. While most newer English peerages descend only in the male line, many of the older ones (particularly older baronies) can descend through females. Under English inheritance law all daughters are co-heirs, so many older English peerage titles have fallen into abeyance between various female co-heirs.
Peerages in the United Kingdom
Some peers, particularly life peers who were well known before their ennoblement, do not use their peerage titles. Others use a combination: for example, the author John Julius Norwich was John Julius Cooper, 2nd Viscount Norwich.