The names don´t help me very much. I only know my grandfather was born 1918 and had two sisters. I don´t know if he had brothers. But it must be a connection between the names. Do you know if the Hacmans are of german origin? It sounds to me like this. My mother told me they cold my GGM, "nemtoaica". I´m not living in Romania now. That makes it difficult for me to search in any way. So as soon as I know something new, you´ll hear from me.