Lewisboro has just one famous person to its name: R. Jay Walsh
The American politician in Connecticut R. Jay Walsh was born in 1854. That places their birth in the early republic. Their story is told in 4 languages. Ridgefield, which borders it, has 20 on its list, the best known Bill Lawrence.
#1 best knownR. Jay WalshPolitics & Law · 1854–1916
From Wikidata and Wikipedia: people whose birthplace is Lewisboro 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.