How many letters does the top answer for “athletics player from second hellenic republic” have?

The most common answer is louis (5 letters).

Crossword clue: athletics player from second hellenic republic

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

louis 5 letters wd-fact-v3

United States prizefighter who was world heavyweight champion for 12 years (1914-1981)

athletics player from second polish republic 67% similar → kusocinski

athletics player from czech republic 50% similar → hejnova, kratochvilova

athletics player from dominican republic 50% similar → santos