Here’s a structure to ponder:
‘Ludwig Wittgenstein is one of the most influential philosophers of language who explained the essential role of “family relationships” in his influential works.’
The phrasing is complicated and and, in fact, wrong (since there are not hoards of philosophers ‘who explained the essential role of…’).
Better (as in clearer, easier to understand and more natural-sounding):
‘Ludwig Wittgenstein, one of the most influential philosophers of language, explained the essential role of “family relationships” in his influential works.’
(Skupno 21 obiskov, današnjih obiskov 1)