Robert Rees (5 April 1841 - 5 June 1892) was a Welsh tenor and musician.
He was a successful competitor at eisteddfodau for which he adopted the pseudonym Eos Morlais, and in 1867 he won the main prize as a vocalist at the National Eisteddfod of Wales.
He was recognised as one of the leading Welsh soloists of his time.