Ah, Romania. Neighbor of the former Yugoslavia. Why is this relevant?
The dhampir comes from the gypsy lore of eastern Europe. The vampires of some gypsy legends have insatiable sexual appetites (along with their appetite for blood), mainly directed towards their widows. Although a female vampire cannot bear children, a child can be produced from the union of a male vampire and living woman. These children, most of whom are male, are called dhampirs, and have the special ability to detect vampires (many of whom can become invisible in gypsy legend). The dhampir may hire himself out as a vampire killer, either engaging in all sorts of odd rituals, wrestling with the invisible spirit, and/or doing it in with a single shot from a pistol. Just like vampires, the exact names and characteristics of the dhampir differ from region to region. Most of the time, dhampirs were considered to be normal humans, other than their special abilities of detection, but in some cases they were thought to have a jelly-like body, dooming it to a short life. This latter claim stems from a belief that vampires have no bones. In some traditions, the abilities of a dhampir can be passed to a male offspring, creating a dhampiric lineage. Other names for dhampirs include vampir (if male), vampuiera (if female), vampijerovic, or lampijerovic. The last known dhampir ceremony, lest you think these creatures are remnants of the distant past, took place in Yugoslavia in 1959.
- Victor Mordenheim's Superstitious Bunkum [http://s91291220.onlinehome.us/folklore.htm] (emphasis mine)