Vitalik Buterin in the inventor of Ethereum. He is a multi talented person who is a Russian Canadian citizen. His is a programmer and writer and mostly known as the co-founder of Ethereum and Bitcoin Magazine. He born in Russia on 31st January 1994 and he become famous on 2015 with the invention of Ethereum at the age of only 21 years. He also works in fields like Smart contract, Digital currency, Game theory.
That's all my knowledge about him. Thank You for reading.
Here is your answer per wikipedia:
Ethereum was invented and developed by a Russian person called Vitalik Buterin. However, he did not fully create it alone, but instead got help from a lot of other programmers.