Board Thread:Spoilers!/@comment-1916997-20151015000622/@comment-24674051-20151016143654

Also, to the point of royalty. Liam and Killian were officers in the Royal Navy. typically, (and I would say that we are looking around the equivalent of 1700-1800 timeframe)  officers were not commoners or peasants. They were, typically speaking, more nobility. Genrally a minor noble, not quite to the point of a baron even, since they did not necessarily have land, but they would have many of the same rights and privileges and other nobles.

I would not be surprised at all if Killian's dad turned out to be some minor noble in the kingdom.