found: Work cat.: 2007484119: Książęcy ród Gryfitów, 2006:p. 5 (rulers of Pomerania during the Middle Ages until 1637)
found: Nowa encykl. powsz. PWN(Świebodzice, Gryfici, Polish ducal family, rulers mainly in Kraków and Silesia region during the 12th-13th centuries)
found: Czajka, M. Leksykon Polski historii, 1995(Gryfici, Świebodzice; medieval ducal family, ruled mainly from the 12th to 14th century)
found: Boras, Z. Książęta Pomorza Zachodniego,1978:t.p. (dynastii Gryfitów)
found: Wikipedia, June 11, 2008(House of Pomerania; House of Greifen; House of Griffins; Pomeranian dynasty of dukes, rulers of Pomerania from the 12th cent. until 1637; under Farther Pomerania: Griffin dynasty, ruled until 1637)
found: Google search, Aug. 28, 2008(Griffin dynasty; House of Pomerania; Greifen dynasty; Gryf dynasty)
found: Neue deutsche Biographie(Greifen; house of Pomeranian dukes ruling from the 12th cent. until 1637)
notfound: Am. fam. names;Cent. pop. growth
