Of or pertaining to the Westphalia region or its people and culture.
Then comes the imperative necessity of eating smoked Westphalian ham for breakfast: this is on the principle that imitation is the most delicate flattery.1837, L[etitia] E[lizabeth] L[andon], “Lady Marchmont to Sir Jasper Meredith. Courtiers.”, in Ethel Churchill: Or, The Two Brides. […], volume I, London: Henry Colburn, […], →OCLC, page 259:
2
Human sciences, Linguistics, Sciences Of or pertaining to Westphalian Low German.
3
Government, Politics Of or pertaining to the Peace of Westphalia of 1648 which established a new system of political order in Central Europe, based on the concept of co-existing sovereign states.
The long stagnation and despotism under the Chinese world order in East Asia before the late 19th century are thus pretentiously repackaged as China's alternative to the Western-dominated, Westphalian system of international relations.2006 April 10, Fei-Ling Wang, “Heading off fears of a resurgent China”, in The New York Times:
Derived terms
East Westphalian, North Rhine-Westphalian, post-Westphalian, pre-Westphalian, South Westphalian, Westphalian ham, Westphalian Peace, Westphalian sovereignty