Robert Ellis (also spelt Elis; 3 February 1812 – 19 August 1875), also known by the bardic name Cynddelw,  was a Welsh language poet, editor, biographer, lexicographer and eisteddfod adjudicator.
Robert Ellis (also spelt Elis; born February 3, 1812, died August 19, 1875), known as Cynddelw, was a Welsh-language poet, editor, biographer, lexicographer and eisteddfod judge.