According to the Old Testament, Moses’ older brother was named Aaron.
Exodus identifies Aaron as the brother of Moses and Miriam. When Moses hesitated about speaking to Pharaoh, Aaron was appointed to speak on his behalf. He therefore served as Moses’ spokesman during the demand that Pharaoh release the Israelites from slavery.
Aaron became the first high priest of the Israelites in the wilderness. The priestly tradition in the Torah traces the high-priestly line through Aaron and his sons, including Eleazar. Aaron’s role was religious as well as political, but the Old Testament also records his failures, especially his involvement in making the golden calf while Moses was on Mount Sinai.
Joshua was Moses’ successor as leader, not his brother. Hur was an associate of Moses, and Eleazar was Aaron’s son. These figures are all connected with the Exodus narrative, which can make the family relationships easy to mix up.