The term 'Thomist' is a modern scholarly formation, coined in the 19th century to categorize the intellectual tradition stemming from the 13th-century theologian and philosopher, Thomas Aquinas. It directly builds his Latinized name, 'Thomas', into the word, specifically using the base 'Thom-'. This base is combined with the highly productive agentive suffix '-ist', borrowed via Latin from Greek '-istes', which signifies a person who practices or is concerned with something. Thus, the word's logic is transparently biographical and doctrinal: it literally means "one associated with Thomas," concretely linking the individual to the expansive school of thought he inspired.

Structure: thom (name Thomas) + ist (adherent suffix) 'Thom' is derived from the personal name 'Thomas', originating from the Aramaic תָּאוֹמָא (Ta'oma') meaning "twin". 'Ist' is a suffix of Greek origin (via Latin -ista) denoting an adherent of a particular system, doctrine, or person.