Sentence examples for eldest brother from inspiring English sources

"eldest brother" is correct and commonly used in written English.
You can use "eldest brother" to refer to the oldest brother in a family or group of siblings. It is often used to distinguish between multiple brothers in a family. Example: "My eldest brother is always looking out for me and giving me great advice." In this sentence, "eldest brother" refers to the oldest brother in the family. "Eldest brother" can also be used in a broader context to refer to the oldest male sibling in a group. For example, "He was known as the eldest brother among his group of friends." In this sentence, "eldest brother" refers to the oldest male friend in the group.