Dalk definition

From Middle English dalke, dalk, from Old English dalc (“clasp, buckle, brooch, bracelet”), from Proto-Germanic *dalkaz (“clasp, pin”), from Proto-Indo-European *dʰelg- (“to stick; needle, pin”). Cognate with Icelandic dálkur (“cloak-pin”), Latin falx (“scythe”).

Perhaps a diminutive of dale, dell.