Query about Earldom of Cavan

[Paul Theroff]

There is a lengthy discussion about this earldom here:

https://groups.google.com/g/peerage-news/c/ZseffZGTPW4/m/Zbg76J4RDAAJ

but as far as I can tell my question was not covered there.

Why do Debrett's and Burke's in recent editions not include the descendants of Oliver Lambart, younger son of the 1st Earl of Cavan?

They were included apparently up to the time that the head of that line was created a Baronet in 1911. See, for example, the 1885 Burke's:

https://babel.hathitrust.org/cgi/pt?id=umn.31951001409926e&seq=393

After that Baronetcy became extinct in 1986, Burke's seems to have dropped that line from its publications, and Debrett's does not include them, either. (The most recent Debrett's I have is 2011, so forgive me if they have been added in later editions.)

Are not they all in remainder to the earldom of Cavan?

[Paul Theroff]

Another Cavan oddity:

I think we have discussed this issue before, but if so I cannot find it. It seems to be the general practice that a woman is often granted the rank of a daughter of a Duke/Marquess/Earl when her brother succeeds to the title, if their father died before he could succeed to it. However, it is unusual for a woman to be granted such rank when her brother did not succeed. There are examples of this in the Portland family, among others.

But in the Cavan family, Edith Lambart was granted the rank of an Earl's daughter in 1947 after her father's older brother died and was succeeded by her father's younger brother.