Surnames were not used at the time. His name was Vaceslav of Bohemia.
Good King Wenceslas
Good King Wenceslas' real name was Wenceslaus I of Bohemia. He was a historical figure who became the Duke of Bohemia in the early 10th century and is celebrated for his generosity and piety. His feast day is observed on September 28, and he is often regarded as a symbol of good governance and Christian virtue. The popular Christmas carol "Good King Wenceslas" is based on his legacy.
Good King Wencelas was involved in the famous Christmas carol, called "O Come, O Come Emmanuel", and also the song called, "Good King Wenceslas". The good deeds that Good King Wencelas was involved with in the famous Christmas carol "Good King Wenceslas" was by giving alms generously to widows, and those in prison and the orphans.
Wenceslas
There are many famous churches in Prague, the capital of the Czech Republic. However, probably the most famous is St Vitus' Cathedral which is found within Prague Castle on a hill overlooking the city. Apart from being a stunningly beautiful building and architecturally wonderful, its real claim to fame is that it is the last resting place of St Wenceslas, a Godly man who became king of that area. Wenceslas may be familiar to you as 'Good King Wenceslas' of the Christmas carol, but far from being just a story (as many believe) Wenceslas was a real king who brought Christianity to those parts and was made a saint as a result. His tomb is a small, humble affair with a roofed plinth housed in a small chapel on the south-east end of the cathedral.
He was a Bohemian Czech, venerated as Saint Wenceslaus in the Czech Republic to this day. He was never actually King of anywhere, but was Duke of Bohemia and had the "regal dignity and title" conferred on him (posthumously) by the Holy Roman Emperor Otto I - thus the legend surrounding his name refers to him as "King".
Last name king in Irish
MARTIN LUTHER KING!(LAST NAME "KING")
archeologists and scientists don't really know what king tut's last name was or if egyptians even had last names for that matter.
His last name was Godwinson.
yaa king booker from wwe his last name is washington
King Arthur's last name is Pendragon