Joseph, no last name known.
Patrick's writings do not indicate his given name but legend says that his given name was Maewyn Succat.
if you mean his NAME, before he became king it was Tutankhaten, after he became king it was Tutankhamun.
It is believed that the pharaoh Horemheb was a commoner, and perhaps a scribe, before he became pharaoh.
Ceylon was Sri Lanka's old name before it became a republic.
The last name of the Buddha before he became enlightened was Siddhartha. It was after his enlightenment that he was known as Gautama Buddha.
Usually as The Great War.
Lord buddha was known as siddhardha before he became Lord Buddha. Siddharth was a Hindu king or prince.
Armistice Day :))
Before converting to Islam, Muhammad Ali was known as Cassius Clay.
For Tet or Kieran Hebden his real name is best known for being a post-rock and electronic musician. He first became a Fridge band before he became a soloist.
Mexico was known as New Spain before it gained independence from Spain in 1821.
Saul's name was changed to Paul after he accepted Jesus as his savior. Paul became an apostle.
Darth Sidious is known to the majority of the galaxy as Emperor Palpatine. Before he became the emperor he was a senator from Naboo, so he was known as Senator Palpatine. When he ascended to the chancellorship of the Senate, he became known as Chancellor Palpatine.
Saint Matthew's real name was Levi before he became one of the twelve apostles of Jesus.
B. It was originally named the Ladybird then became known as the Lady Beetle and then it became known as Ladybug.
His real name was Isa