Who was Hermann Künneth?
I found some links that may be of use:
https://eudml.org/doc/146661 The above link is from the European Digital Mathematics Library
http://gdz.sub.uni-goettingen.de/dms/load/img/?PPN=GDZPPN002137240&IDDOC=248099 The above link is an article about him from the first link.
He was German and as I kind of expected, you need to understand German to read it. Essentially most of his info is written in German. I think that's the best you can get. (He died in 1975)