Apart from the 79 Kings listed, the Pictish Chronicles also give a list of 28 kings (though they describe it as 30) called Brude, who supposedly reigned for a total period of 150 years; (there’s that 150 again) Their reigns followed Cruithne and his seven sons and preceded King Gede. (No. 1)
Most historians are doubtful that these ‘Brudes’ were actual kings. They believe that, as they were all improbably called by the same name and occur as they do in pairs, it is more likely that they were some sort of slogan or jingle, intended to be chanted repeatedly as a form of rallying cry. Certainly, their lay out gives the impression that they may have been designed to be an aid to memory for some ritual or other whose meaning has ironically been lost to us. They are given below.

It has been suggested by some linguists that the prefix ‘Ur’ may be similar to the Welsh ‘Guor’, meaning ‘high’ or ‘over’, and the Gaelic prefix ‘Fior’ meaning ‘true,’ ‘pure’ or ‘noble.’ Other linguists have suggested that Ur may be a Pictish form of the Celtic ‘Ua’, meaning ‘descendant’ or ‘son’. Others yet that ‘Brude’ may not be a personal name so much as a title, like Lord or Sir. Brude Ur Leo, for example, may mean ‘Leo, the Lord High’.
It will not have escaped the reader’s attention that many of the Brudes have names that also appear in the King Lists in a similar or approximate form. See below.

If we take into account the realistic probability that the southern Picts spoke a form of P-Celtic similar to Old Welsh (while not forgetting the other learned arguments that have been put forward to the contrary), then it may be that these ‘Brudes’ are simply a ‘P’ form (hardened to a B) of the Irish and Gaelic word ‘Cruth’ or ‘Cruithne’, meaning ‘of the Picts’.

The Irish text in the 14th century ‘Book of Ballymote’ says,

“Bruide adberthea fri gach fir dib, randa na fear aile; ro gabsadar L. ar C. ut est illeabraibh na Cruithneach”.

This translates as;

The implication is that everyone in Pictland was a ‘Brude’ and indeed this, or something similar, may have been what the Picts originally called themselves. As for those other kings called Brude in the main King List, like Brude the son of Bile (48), and Brude the son of Uurguist (59), they may simply have been named Brude in the same way that many Scots of today are called ‘Scott’.

The list of 28 Brudes might have been Pictish Kings after all.