Three Rocks has yet to put a famous person on the list
No town in California lists more than Modesto, with 65. Alameda has the second-longest list in California, after Modesto, with 64. The California lists hold names for 561 towns.
Who’s listed here
Famous people come from Wikidata (people whose birthplace is Three Rocks), checked against each person’s English Wikipedia article and ranked by how many Wikipedia languages cover them. Nobody born in Three Rocks has passed that check yet, and nobody born within 35 miles is listed.
From Wikidata and Wikipedia: people whose birthplace is Three Rocks and whose English Wikipedia article agrees, ranked by how many Wikipedia languages cover each person. People known mainly for crimes, and adult performers, aren’t listed. “The usual town” = everyone born in the towns gathered so far.