From the introduction: "I now consider the presence versus absence of the article with proper names, for people in the book of Acts, using the following four categories of description:
-- the unmarked patterns involving the first mention of a participant and further references to the participant in the same incident (Sect. 1); -- the reintroduction of participants after an absence (Sec. 2); -- further references to a participant in the same incident which are anarthrous, instead of arhrous (Sect. 3); -- the use of the article with names in reported speeches (Sect. 4).
"By dividing my discussion into four parts, I do not mean to imply that I am illustrating different principles. Rather, in different contexts, they illustrate a single principle: ANARTHROUS REFERENCES TO PARTICULAR, KNOWN PARTICIPANTS EITHER MARK THE PARTICIPANT AS LOCALLY SALIENT, OR HIGHLIGHT THE SPEECH WHICH S/HE UTTERS."
Levinsohn, Stephen H.
"The definite article with proper names for referring to people in the Greek of Acts,"
Work Papers of the Summer Institute of Linguistics, University of North Dakota Session: Vol. 35, Article 2.
Available at: https://commons.und.edu/sil-work-papers/vol35/iss1/2