Conversation so far:
What are some of the Hereditary Peer ranks?
Dukes, Marquesses, Earls, Viscounts, and Barons
How do you obtain Hereditaty Peer rank?
The creation of peerages is a royal prerogative. In modern times all peerages have been created by letters patent. The title may descend after the death to the bearers offspring.
Any titles different from Hereditary Peer ranks?

Question: Are there other titles or ranks?
Self-contained rewrite: Are there other titles or ranks within Hereditary Peers?