"Derf: Middle English, of Scandinavian origin; akin to Old Norse djarfr bold; akin to Old English deorfan to labor, perish, Old Saxon derƀi strong, Old Frisian derve bold, Armenian derbuk rough, stiff, Lithuanian dìrbti to work; basic meaning: to work"
Ha! All this time I had just assumed your name must be "Fred", and you were just writing it in reverse for a TOL handle!