An Etymological Dictionary of the German Language/Annotated/Hasel

by Friedrich Kluge

Hasel, feminine, ‘hazel,’ from the equivalent Middle High German hasel, Old High German hasala, feminine, hasal, masculine; compare Anglo-Saxon hœsel, English hazel, Old Icelandic hasl (hence hǫslur, plural, ‘boundary posts’); the common Teutonic word for ‘hazel,’ from pre-Teutonic kósolo-; hence in Latin, with the normal change of s into r, corulus, ‘hazel’; compare further Old Irish coll, ‘hazel,’ for *cosl.