January 1837
Caleb Blodgett persuaded a family—the Chauncey Tuttles with four sons—to come from Meacham's Grove to Beloit.
BeloitGrade A · 1 independent source
The evidence
“Our record of those earliest pioneers of Beloit, prior to the purchases of the New England Company, includes besides Caleb Blodgett and family and John Hackett, Major Charles Johnson, John Doolittle and the Goodhues, father and son William (our first mayor), also a family whom Blodgett persuaded to come from Meacham's Grove in January, 1837, Chauncey and Mrs. Tuttle with four sons, Chester, Frank, William and George.”
1908-brown-rock-county/06-history-of-beloit.md, Vol. 1, PDF p. 157 / book p. 141
Brown, William Fiske, editor. Rock County, Wisconsin: A New History of Its Cities, Villages, Towns, Citizens and Varied Interests, from the Earliest Times, Up to Date. Chicago: C. F. Cooper & Co., 1908. 2 vols. archive.org/details/rockcountywiscon01brow, archive.org/details/rockcountywiscon02brow.
Grade A: Found on a page of one of our sources