We encountered this word only once while reading “Hills like White Elephants.” It appears about halfway through the story, in the context of the setting. The Ebro is a set piece in this story meant to signify that it takes place in Spain.
“The girl stood up and walked to the end of the station. Across, on the other side, were fields of grain and trees along the banks of the Ebro. Far away, beyond the river, were mountains. The shadow of a cloud moved across the field of grain and she saw the river through the trees.”