The Duran’s Alex Christoforou.
Wasn’t there a time when “sanctioned” meant sanctified?
I don’t see a connection via their respective definitions at first glance, but that doesn’t mean there wasn’t a connection in the past. Perhaps a religious figure of some sort could “sanctify” a “sanction”? I’m grasping at straws here.
I may have found something. …“make sacred”…
sanction (n.)
1560s, “a law or decree,” from Latin sanctionem (nominative sanctio) “act of decreeing or ordaining,” also “a decree, an ordinance, a law,” noun of action from past-participle stem of sancire “to decree, confirm, ratify, make sacred” (see saint (n.))
A pretty comprehensive analysis here; whatever position one might have, this one is worth watching. Thanks for posting 
Yep that’s the go to for me when wanting the historical origin of a word.