Thanks for your efforts Somebody.
From your scans I can see that Luke 8:39 uses the word "Ιησους" (Jesus), whilst Mark 5:19 uses the word "κύριος" (Lord) and I notice they use a capital (uppercase) "L" in the English, meaning God (you can check that under definition "C" on Bible Hub: http://biblehub.com/greek/2962.htm)
Thanks for the intriguing question.