Sonnet Crowns are simply a string of sonnets, each beginning with the ending line of the previous one and the final one ending with the beginning line of the first in the series.
A sonnet Corona is a string of 14 sonnets each of them starting with the last line of the sonnet before it.
A Sonnet Redouble’ is a similar series of 14 sonnets, followed by a fiftteenth made up entirely of the first line of the preceding 14.
I have found few in the the last decade and most are not truly composed of English Sonnets.
I have created a page that show all I have found.