Thanks for the explanation. After changing 

stream nextPut: char basicSqueakToIso .

to

stream nextPut: char .

in readStringAtAddress: anAddress from SqliteResult I was able to get the character back that I expected (after using the UTF8TextConverter). 

And now the following works also (where name contains the UTF-8 string):

arrayOfDicts do:[:row | Transcript show: ((row at: #name) convertFromEncoding: 'UTF-8'); cr]

Regards

   Roger