Egharevba was born in Idanre, Ondo State, His father was related to Ohenmwen, Iyase of Benin and his mother, Okunzuwa was the granddaughter of Ogie Ezomo I. His father was a trader but died in 1902. Egharevba spent part of his early childhood at the residence of his aunt in Idanre. His education was brief and irregular, he spent a year at St James' CMS School, Ibadan in 1899 and then an interval where he was out of school. He returned to studies at St David's School, Akure in 1911 before moving to St. Mathews, Benin. As a young boy, he worked part-time as a helper on canoes ferrying goods for sale between Benin Division and nearby cities. After finishing studies, Egharevba held a few low paying jobs. He worked as a water rate clerk in Benin but left the job in 1917 to work for the Public Works Department. In 1922, he began trading goods in Benin and Sapele. During this period, he became close to the family of Oba Akenzua II. His friendship with the royal family allowed him access to senior informants who had knowledge of Benin's oral history.
Professional career
In 1921, Egharevba wrote the draft of his first book, Ekhere vb Itan Edo later known as The ShortHistory of Benin. The book was published c.1933 by CMS Press and was very successful. His first four publications were in the Edo language, but he switched to English in 1934 due to its widespread use and the effect on commercial appeal. He followed his first book with Benin Law and Custom, published in 1934. Egharevba's knowledge of Benin history, laws and customs was used in Native Court cases where he served as consultant on Benin traditions. Apart from writing books, he contributed articles to newspapers and wrote petitions to the colonial government. In 1934, he started a printing press in Benin. Egharevba was appointed the curator of the Benin Museum in 1946. While working as a curator, he was also a prolific writer, having written 28 books by 1968. In 1973, 13 of his works were published in two volumes.
Works
Egharevba's most famous work is A Short History of Benin. Published in different editions, it has major differences in some paragraphs between the editions. His books which documented the oral history and culture of Benin cut across different disciplines but the main content deals with issues, events, institutions, practices and personalities in Benin history. A lot of his early writings from 1934 to 1948 dealt with documentation of oral history, folklore and customs to instill moral values in young people. Afterwards, he included commentaries about contemporary issues and personalities in Benin history in his writings. However, some of the materials are repetitive, re-stating statements from his earlier works.