While researching the various Stanhope Earls I was reminded of this thread. I took the trouble of composing a post for this thread, FAR TOO BORING TO READ. I’m posting it anyway on the very off-chance that it will mesh with someone 's whimsy. Please PM if it did!
TL;DR summary: The Barony Stanhope of Elvaston passed to an 8th cousin.
When Henry VIII dissolved the Papist monasteries of England; Elvaston Castle was part of the Priory of Shelford and was purchased by Sir Michael Stanhope, who was Esquire of the Body of King Henry VIII, Groom of the Stool of Henry’s successor, etc. But we begin our story with Michael’s grandson John (I) Stanhope (1559-1611), Postmaster General for Her Majesty. We need mention only two of John’s sons: Philip, his only son by his first wife, was made 1st Earl of Chesterfield; so John left Elvaston Castle to his first son by his 2nd wife, John (II).
Philip had three sons whose heirs eventually held the Earldom of Chesterfield. One grandson became 2nd Earl of Chesterfield; another grandson, James, was Chief Minister of England and given several noble titles including Baron of Elvaston, Viscount of Mahon, Earl of Stanhope. The first two noble titles (but not the Earldom) were entailed: in the event that James’ heirs became extinct, they would pass to the heirs of the body of the owner of Elvaston Castle, John (IV), grandson of afore-said John (II). Thus John (IV) was the 2nd cousin of James (Chief Minister and 1st Earl Stanhope). John (IV)'s oldest son, William, was made 1st Earl of Harrington.
So we have three Earldoms held by the agnatic descandants of Elizabeth’s Postmaster General. Let’s review their course.
The Earldom Stanhope of Harrington passed successively to the son of the 1st Earl, son of 2nd, son of 3rd, brother of 4th, son of 5th, 1st cousin of 6th, son of 7th, brother of 8th, son of 9th, son of 10th, son of 11th, the living 12th Stanhope Earl of Harrington, Charles Henry Leicester Stanhope born 1945.
Meanwhile the Earldom Stanhope passed successively to the son of the 1st Earl, son of 2nd, son of 3rd, son of 4th, son of 5th, son of 6th, who was the 7th Earl Stanhope, James Richard Stanhope born 1880.
Finally the senior line: the Earldom of Chesterfield passed to the grandson of the 1st Earl, son of 2nd, son of 3rd, 3rd cousin once removed of 4th, son of 5th, son of 6th, 3rd cousin of 7th, 4th cousin of 8th, son of 9th, brother of 10th, nephew of 11th. However the Stanhope line was starting to be rather sparse. Note that already two 3rd-cousins and a 4th-cousin had shown up in the inheritance chain.
From the 12th Earl of Chesterfield, the Earldom passed to the 12th’s 7th cousin once removed! This 13th Earl of Chesterfield was the very same James Richard Stanhope, 7th Earl Stanhope, mentioned above. Two Earldoms, the Barony Stanhope of Elvaston and Stanhope Viscounty of Mahon were now all united!
But when James Richard died childless in 1967, both Earldoms went extinct. The lesser titles passed, via the entailment mentioned above, to the 11th Earl Stanhope of Harrington, who was James Richard’s 8th cousin once removed.
Such zig-zagging is common in Salic Law inheritances. Can anyone find a 9th cousin inheritance among English or Scottish noble titles?