An Etymological Dictionary of the German Language/Annotated/Krolle
Krolle, feminine, ‘curl’ (Rhenish), from the equivalent Middle High German krolle, krol(-les), masculine; compare Dutch krul, feminine, ‘curl.’ Middle High German krol, adjective, Dutch krullig, Middle English crul, adjective, ‘curly’; Dutch krullen, Middle English crullen, ‘to frizzle.’ For the connection between Middle High German krolle, feminine (Gothic *krŭzlô), and Modern High German kraus, Middle High German krûs, see under kraus.