The adjective 'Wilsonian' is a modern political coinage derived entirely from the name of Thomas Woodrow Wilson (1856–1924). The suffix '-ian', with its origin in Latin '-ianus', is a highly productive suffix in English for forming demonyms and relational adjectives (e.g., 'Victorian', 'Jeffersonian'). The term was coined to encapsulate the principles associated with Wilson's presidency, particularly his vision for a post-World War I order based on democracy, self-determination for nations, and the establishment of an international body (the League of Nations) to ensure peace. Thus, the word's logic moves from a concrete personal name to an abstract set of ideological tenets, with the suffix performing the crucial function of converting the proper noun into a descriptive adjective for a political doctrine.

Structure: wilson (proper name) + ian (adjective-forming suffix) 'Wilson' is a patronymic surname of English origin meaning "son of Will (William)". In this context, it functions as a proper noun referring to the 28th U.S. President. The suffix '-ian' is from Latin '-ianus', indicating "belonging to" or "relating to".