Joshua Falk (also: Joshua ben Alexander HaCohen Falk was a Polish Halakhist and Talmudist, best known as the author of the "Beit Yisrael" commentary on the "Arba'ah Turim" as well as "Sefer Me'irat Enayim" (סמ"ע) on "Shulkhan Arukh". His name also occurs as the Hebrew acronym "RaFaK" ("R[abbi]] Falk Kohen") and "Ma-HaRWaK" ("Morenu ha-Rab Walk Kohen"). Wikipedia
His name occurs as "RaFaK" (= "R. Falk Kohen") and "Ma-HaRWaK" (= "Morenu ha-Rab Walk Kohen"). www.jewishencyclopedia.com/view.jsp?artid=20&letter=F&sea...
Falker H or P or A House No. 62 in Frankfurt bore the sign of the Falke, falcon or hawk, and some Falks derive their name from that source. www.shtetlinks.jewishgen.org/Kolomea/nameorigin.htm
The definitive Wikipedia entry for Joshua Falk. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Joshua_Falk