Only if a man had no previous right to a summons to the rank of peer or a higher title – either because his family had never had a summons previously or because he was of a cadet line – is he included as a member of the ‘new’ parliamentary peerage. As a result, my list is somewhat different from that given by Powell and Wallis in The House of Lords in the Middle Ages for two main reasons.

Firstly, certain names are missing from my list in comparison with Powell and Wallis's due to the fact that they sometimes referred to eldest sons as being ‘new’ either (1) when their fathers or grandfathers had only occasionally been summoned to parliament, or (2) when their fathers or grandfathers had been summoned frequently, but they themselves had not been summoned since the death of their fathers (or grandfathers). For my selection of individuals, the fact that these men, or their families, were nonetheless considered of enough previous importance to be summoned in the first place excludes their sons and grandsons from the ‘new’ classification. For similar reasons I have also omitted the ‘revived’ earldoms of Devon and March from this list.

Secondly, and conversely, Powell and Wallis do not tend to consider men ‘new’ who happen to either marry into, or gain by collateral inheritance, lands held in barony.