I've realized that one of the sponsors for Junior's marriage reads: "Edwardus Barry Clericus." I originally thought the last part was a townland, but now I realize it is a Latin term.
And that this same man named Edward Barry appears as one of the sponsors for the McCarthy marriage, below Junior's entry, where the groom's father was from Killorglin.
I'm not clear on the exact meaning of "Clericus", but I think it was basically another priest or special Catholic layman, maybe a clerk.
To me, this is an indication that Junior came from outside the parish of Ballymacelligot, and did not have many local acquaintances. Edward Barry seems to have witnessed about 150 marriages, which would make me believe he was the clerk.
I have also realized that the name McCarthy can be found in Maglass, where Junior's bride came from and where he had his first child. This may indicate that the marriage was arranged with the help of relatives with the name McCarthy.