Not really wanting to draw more attention away from the OP's intended connection-making (if I had a rich noble, I'd throw them at you!) but did want to quickly step in and drop some lore on Eorzea nobility, as it is a topic that crops up on the rpc every year or so.
-Eorzean Nobility Lore
There's a link within the link that discusses Gridania's "gentry" (a term most commonly referring to a social class just below nobility) in more detail. It also goes into the reasons why Lady Dartancours is most likely an Ishgardian noble and not Gridanian. Haukke Manor being forcibly taken away from the Padjal because it was a symbol of excess, being one of those many cited references.
That out of the way though- I think it's safe to say the OP's character is likely on the lookout for rich people, affluent merchants, or well-to-do trade tycoons of any nation, not just strictly nobility. Though, this being the son's early forays into cultures outside of Ul'dah's capitalistic approach, having him show up in Gridania and interact with characters who have little comparable concept to wealth or nobility in the eyes of an Ul'dahn would make for interesting RP I think.
-Eorzean Nobility Lore
There's a link within the link that discusses Gridania's "gentry" (a term most commonly referring to a social class just below nobility) in more detail. It also goes into the reasons why Lady Dartancours is most likely an Ishgardian noble and not Gridanian. Haukke Manor being forcibly taken away from the Padjal because it was a symbol of excess, being one of those many cited references.
That out of the way though- I think it's safe to say the OP's character is likely on the lookout for rich people, affluent merchants, or well-to-do trade tycoons of any nation, not just strictly nobility. Though, this being the son's early forays into cultures outside of Ul'dah's capitalistic approach, having him show up in Gridania and interact with characters who have little comparable concept to wealth or nobility in the eyes of an Ul'dahn would make for interesting RP I think.