Chościsko
Chościsko – according to Gallus Anonymus it is the name of father of Piast Kołodziej, the founder of the Piast Dynasty. His name (originating possibly from Old Polish word for a tail chost/chwost) appears in the Chronicle of Gall of Anonym three times. It is likely that the name in in fact a title of prince Popiel due to his long hair.