David go to www.numberway.com and select Venezuela(telephone directory with PAGINAS BLANAS =white pages) and there are 112 listings for REIS and nothing for REISS. You might wish to go thru for any with a familiar first czech name or family name. There is no Blazena that I can see. Try business listings just in case.
Did she come direct to Venezuela or via a third country so perhaps we can trace shipping websites?? Petertimber