Irish Gaelic 'bainn' means milk in English.
Although this episode's director, Adam Arkin, has directed almost 40 episodes of television (as of 2015), he is better-known as an actor and in fact had been a Sons of Anarchy regular in the previous season (in the role of Ethan Zobelle).
This episode used an Irish rendition of the main theme song.
"Mark Petrie" played by Matthew Alan, is actually the name of a character in the Stephen King book "Salem's Lot." The same actor, Matthew Alan, plays "Chris Merrill" in the second season of Castle Rock, a show written about characters and settings featured across the Stephen King literary universe. The season that Alan is part of is also largely centered around Salem's Lot. This multi-layered connection can only be seen as a mutual homage between cast/crew of each production.