Jerry
Not connection to HREHA but I should be able to help you get going with your research. Might you know where your ancestor HREHA was born?
http://www.radixforum.com/surnames/hreha/http://www.radixindex.com/en/surname_index/surname/hrehaHREHA in 1995 in Slovakia in these locations:
http://slovniky.korpus.sk/?w=hreha&s=exact&c=b3ac&am...