This author is also believed to have written Acts of the Apostles.
Along with the Gospel of Matthew, this writer's namesake work is believed to have drawn from the hypothetical Q document.  That work by this author tells the story of Elizabeth and Zachariah, the latter of whom was struck dumb until he agreed to name his son John, who later became John the Baptist. This author also traced Jesus's life back to Adam in that work, the longest of its kind as well as the only one to have a formal introduction. This author is also believed to have written Acts of the Apostles. For 10 points, name this doctor who wrote in Greek the third book of the New Testament, his namesake Gospel.
Along with the Gospel of Matthew, this writer's namesake work is believed to have drawn from the hypothetical Q document.  
St. {Luke}