How do we know he's from Fereldan? He could be from Seheron for all we know.
And it doesn't seem the party in Inquisition is all that Fereldan.
Varric is from Orzammar, which technically counts, I suppose
Cassandra is Nevarran/Orlesian
Vivienne is Orlesian
Sera we don't know
Solas we don't know
Iron Bull is a defector from the Qun, so he's probably from Par Vollen
If DHMG is actually Dorian, then he's from Tevinter, I think
Scribbles we don't know
Leliana is Orlesian
Cole, if he is Cole, is Orlesian (I think, someone feel free to correct me on this)
Blackwall we don't know
The only companion we know is definitely 100% Fereldan is Cullen. And he's not a party member. There are more characters with Orlesian backgrounds, in fact.