Following an internal split from Sevilla FC, another club was formed, Betis Football Club. In 1914, they merged with Sevilla Balompi. The club received its royal patronage in the same year, and therefore adopted the name Real Betis Balompi.
Real Betis: How A Middling Soccer Team Is Developing Into A Distinct Superclub. Contributor. I write about Spanish soccer's big clubs. Somewhere between the crme de la crme and the teams outside Spanish soccer's elite servings, you'll find Real Betis Balompi: the Sevilla-based club hard to pin down.