Marcus of Jerusalem explained

Honorific Prefix:	Saint
Mark of Jerusalem
Titles:	Bishop of Aelia Capitolina
Death Date:	156
Venerated In:	Catholic Church
Canonized By:	Pre-Congregation
Feast Day:	22 October

Mark or Mahalia, sixteenth bishop of Jerusalem (served 135 – died 156) was the first non-Jewish bishop of Jerusalem, renamed as Aelia Capitolina.

His secretary was traditionally thought to have been Aristo of Pella, though the Armenian chronicler Movses Khorenatsi’s evidence for this is insufficient, late (7th Century) and ambiguous.^[1]

He is listed in the Roman Martyrology on Oct. 22.^[2] His successor was the Bishop Cassianus of Jerusalem.

Notes and References

1. A Dictionary of Christ and the Gospels: Volume I . Page 118. Written by James Hastings (2004). "His statement that Aristo was secretary of Ardasches, which was so unfortunately ambiguous as to seem to make him secretary of Mark, bishop of Jerusalem, seems to be the starting-point for the last stage of the process."
2. http://www.boston-catholic-journal.com/roman-martrylogy-in-english/roman-martyrology-october-in-english.htm#October_22nd List of the Martyrs