Peter and Andrew were disciples and they were brothers. I am not sure which brother was the oldest. The scriptures do not directly tell us who is the eldest brother, and I have read differing opinions from bible scholars regarding their birth order. However, there is scriptural evidence the brothers were very different. Peter was out going and motivational. He was the brother who loved to talk. Andrew on the other hand, was thoughtful and quiet. Andrew would be the better listener. They were very different as brothers, how many times do you think they had to forgive each other?