And why's that?
They're both listed in the intro, they have nothing "strange" about their names (aside the fact that murgrabia is an archaism), and there are several people in Poland with such names:
http://www.moikrewni.pl/mapa/kompletny/murgrabia.html
http://www.moikrewni.pl/mapa/komplet...25C5%25BA.html