Was Walt Disney the oldest of all his siblings?

Answer 1

Walt was the fourth of 5 children:

On New Year's Day, 1888, Elias Disney and Flora Call were married. Over the next five years they added three sons to their family: Herbert in 1888, Raymond in 1890, and Roy in 1893. By the time Flora became pregnant again some eight years later, the couple were living in Chicago, where Elias was making a living as a carpenter and builder. On December 5, 1901, a fourth child, Walter Elias Disney, was born, named after the family's pastor. (The pastor, in turn, named his son Elias, after Walt's father.) Two years later a little girl, Ruth, arrived and the Disney family was complete.