Vaclav Noid Barta is a Czech singer who represented his country with Marta Jandova with the song "Hope Never Dies" in the 2015 Eurovision. They did not make it past the semi final.
Saint Václav was a 10th-century duke of Bohemia murdered by his brother. He is the patron saint of the Czech Republic. This was also the name of several Bohemian kings.
The oldest use of this name dates to 907 when the son of Bořivoj II was born. He was christened Václav. He was a Duke of Bohemia for five years before he was murdured by his brother in 929. Saint Václav is now the patron saint of Bohemia.