The American mathematician and logician Haskell Curry was born in 1900. Their birth falls in the age of mills and railroads. Readers can find them written up in 26 languages. Next door, Medfield lists 9, led by Hannah Adams.
From Wikidata and Wikipedia: people whose birthplace is Millis 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.