High Quality Content by WIKIPEDIA articles! Robert Elis (February 3, 1812 – August 19, 1875; sometimes spelt Ellis), professionally known by his bardic name Cynddelw (after a 12th-century poet of the same name), was a Welsh language poet, editor, and lexicographer, born at Tyn y Meini, Bryndreiniog, Pen-y-Bont-Fawr in the old county of Montgomeryshire, Mid Wales.