Oh boy, I have a lot of explaining to do, silly me…
Curonians were a Baltic people living on the Western part of modern day Latvia. There’s a debate over wether they were Eastern or Western Balts, but anyway before the christianisation they were known for their warrior culture and their sailors/pirates. During the Baltic crusades, they used that to their advantage and fought the crusaders (mostly the Livonian Order) on land and sea.
I named Hansards after the Hanseatic League, a trade coalition between several German free cities such as Lübeck, Bremen or Hamburg, which later expanded all over the Baltic Sea. It might sound boring, but those guys were so rich and powerful that they could afford to wage war with bigger states and even defeated the Kingdom of Denmark at some point, forcing it to make humiliating concessions to promote their trade rights.
Occitans are the people from southern France, at the time they covered one third of the territories and some of the bigger and wealthier fiefs outside of the crown land (or even including it at times, such as the Duchy of Aquitaine or the County of Toulouse. Depending on the region and time period they could be part of France, England, Barcelona or the HRE (and sometimes fully independant), but it was a time when ####### were sometimes more powerful than their liege so they benefited from a lot of autonomy.
Outremer (meaning “oversea” in French) is one of the proposed names for the peoples of the Crusader States, as it is sometimes used to refer to all of those realms collectively and the people were usually called Latins or Franks even by other Christians from the West. An alternative name could be “Poulains”, which was a term used to refer to the descendants of crusaders (and sometimes first generation settlers), but it’s rarely used in the English language (and it’s another French word meaning “foal”).
Ifriqiya is a territory in Northern Africa covering Tunis and parts of Libya and Algeria, which were often united into a single state during the Middle Ages (even including Sicily at some point).
Moravians are Czech people living between Bohemia and Slovakia, during the 9th century they formed a bigger state called Great Moravia.
Pomeranians are a people living along the coast of the Baltic Sea on the modern day German/Polish border. During the Middle Ages, the population was successively Slav and German.
Diliwalis is one of the names for the inhabitants of Delhi (admitedly I could have used Delhianis), here they are meant to represent the Sultanate of Delhi.