The next day again John was standing with two of his disciples, and he looked at Jesus as he walked by and said, “Behold, the Lamb of God!” The two disciples heard him say this, and they followed Jesus. Jesus turned and saw them following and said to them, “What are you seeking?” And they said to him, “Rabbi” (which means Teacher), “where are you staying?” He said to them, “Come and you will see.” So they came and saw where he was staying, and they stayed with him that day, for it was about the tenth hour. One of the two who heard John speak and followed Jesus was Andrew, Simon Peter's brother. He first found his own brother Simon and said to him, “We have found the Messiah” (which means Christ). He brought him to Jesus. Jesus looked at him and said, “You are Simon the son of John. You shall be called Cephas” (which means Peter). -John 1:35-42
The Brother of Peter (Simon) also an apostle, Andrew was a fisherman with his brother and the brothers James and John (sons of Zebedee). He was the frist disciple and originally a disciple of John the Baptizer. Tradition has it that after the resurrection he preached in Scythia (Ukraine and southern Russia). He is the patron saint of Russia. He was crucified spread Eagle in Achaia (southern Greece), where he also preached. That is why Scotland has the St. Andrew's cross.
Clement of Rome (?-99) was the first Apostolic Father of the Church. He might be who Paul mentioned in Philippians 4:3, and was the successor to Peter. He is known mostly for his writings to the new Christian churches.
Sola Fide
Saint Martin (316 - Nov 8, 397) as the bishop of Tours. His shrine in France was the most visited sop for pilgrimages on the way to Santiago de Compostela (in Spain). He is one of the most well known early church saints because his life was recorded by a contemporary (Sulpicius Severus).
Martin was born to pagan parents, but converted to Christianity early in life, against his parents wished (Christianity was legalized in 313). He joined the Roman army when he was 15. Once while on patrol, he saw a freezing beggar and cut his cloak in two with his sword to give half to the poor man. After his service, he became a disciple of Hilary of Poitiers, who was a chief proponent of Trinitariansm and opponent of Arianism. Martin continued this apposition to Arainism in his ministry.
Martin Chemnitz (Nov 9, 1522 – Apr 8, 1586), was the man who Compiled the Book of Concord and is known as the Last Reformer. He is also known as as "the Other Martin." A common saying is, "If Martin [Chemnitz] had not come along, Martin [Luther] would hardly have survived." Besides his compilation, which defined what it meant (and means) to be Lutheran, Chemnitz was a prolific writer of theological treatises and multiple documents about church government and oversight.