1) Byzantine military office 
== History == The title is first attested in the late 9th century, when the Kletorologion of 899 lists him as one of the senior officers of the Vigla or Arithmos guard regiment (tagma).{sfn|Kazhdan|1991|p=42} In the 9th–10th centuries, the akolouthos (often termed ἀκόλουθος τοῦ ἀριθμοῦ, akolouthos tou arithmou, to emphasiz...