Okay, so the first thing you need to know is this: There is no shared continuity between Final Fantasy XII and XIV. The names and appearances of characters in the Return to Ivalice and Save the Queen storylines are references to those from past Ivalice games, but that's as far as it goes.

Fran is a member of Lente's Tears, a resistance faction allegedly led by the Princess of Dalmasca—how this is possible when she's supposed to be dead has yet to be shown. Ashe and Rasler, the deceased Princess and Prince of Rabanastre, are fraternal twins rather than wife and husband. Balthier was originally intended to appear during the Return to Ivalice storyline, but he was cut for some reason and all that remains is his clothing, which is the Ranged DPS set from Orbonne Monastery. Vaan and Penelo have not, and likely will not, make an appearance—the closest Vaan gets to doing so is his Tactics A2 clothing being used for the Melee DPS gear in the Ridorana Lighthouse.

Basch fon Ronsenburg is Basch van Gabranth here, and Noah fon Ronsenburg AKA Judge Gabranth is Noah van Gabranth. They are a father/son duo rather than brothers, the former having died somewhere in the neighborhood of over 30 years ago and the latter stepping up to replace him as the Legatus of the IVth Legion, just in time for the brutal subjugation of Dalmasca. He was fairly young at the time, and is in his 40s/50s now.