Mrs. Cadwallader was strong on the intended creation of peers: she had it for certain from her cousin that Truberry had gone over to the other side entirely at the instigation of his wife, who had scented peerages in the air from the very first introduction of the Reform question, and would sign her soul away to take precedence of her younger sister, who had married a baronet.
There are no more uses of "peerage" in the book.
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In the British peerage system, individuals are ennobled — not families.
I knew a little from our infrequent stays with Baron Greyfallow, and thought I was quite genteel enough without having to memorize forms of address, table manners, and the elaborate snarled rankings of the peerage.