Georges Henri Lemaitre was a Belgian physicist and mathematician who is widely known for his groundbreaking work on the Big Bang theory. While he is most commonly referred to by his full name, there are a few synonyms that can be used to refer to him as well. Some of these synonyms include: Father of the Big Bang theory, Cosmic Egg Creator, and Originator of the Universe. Regardless of which synonym is used, Lemaitre's work in the field of cosmology has had a profound impact on our understanding of the universe and has cemented his place as one of the most important scientists of the 20th century.