Roland's father is called "Marcus Aris Darcus Demus Lucas Allen" in the Bible of Roland's aunt, Olive J. Allen Brandon Stone, but this spelling is incorrect. See below:
Olive seems to have had a grandson, Keith W. Brandon, who is interested in family history. It was apparently Keith who, in correspondence with his uncle Roland Allen, alluded to an entry in Olive's Bible wherein she had referred to her brother as "Marcus Aris Darcus Demus Lucas Allen". We have a photocopy of a sheet of family data which seems to have been written by Keith to Roland -- a son of the afore-mentioned Marcus ... Allen. At the head of that sheet of family data is the statement "FROM FAM. BIBLE OF OLIVE J. ALLEN BRANDON STONE" By [Keith W. Brandon, HC 52, Box 980, Hemphill, Texas 75948], a mailing label. In March 2001, the afore-mentioned name of Marcus ... Allen has been corrected by Roland to conform with what is found in the Bible, Philemon 23-24, i.e., "Marcus Aristarchus Demas Lucas", the names of 4 of Paul's fellow workers/prisoners. Emily, Roland's sister, stated that their father had changed his name from that hopelessly long moniker to "Mark Lucas Allen" and then later to "Mark L. Allen".