I'm unfamiliar with how one approaches the declension of proper nouns, especially as it pertains to presidents, e.g., Jeffersonian. I suspect it's kind of a black art. I need to do this with Coolidge and have no idea where to start. What would be an acceptable form? Coolidgean?
Coolidgean is in the Merriam-Webster dictionary, so even though it sounds really weird to me, I expect it's the most acceptable form.
Washingtonian Adamsonian Jeffersonian Madisonian Monrovian Jacksonian Burenian Harrisonian Tylerian Polkian Taylorian Filmorian Pierceian Buchananian Lincolnian Johnsonian Grantonian Hayesian Garfieldian Arthurian Clevelandian Harrisonian McKinleyan Rooseveltian Howardian Wilsonian Hardingian Coolidgean Hooverian Trumanian Eisenhoweran (can't find a cite for this, but maybe "Ikeian"?) Kennedian Nixonian Fordian Carterian Reaganian Bushonian Clintonian Obamaian
Of the above, some do not have common adjectival forms. The "Clintonian Doctrine" was standard, but then see the "Bush Doctrine." I would suggest the same for Eisenhower. Any of these that do not seem happy in the adjectival could probably be replaced with the name plainly.