I have found John Westbrook and Elizabeth (Unknown) Westbrook
in the 1870 census in Midland County, Michigan
1870 Federal Census - Michigan > Midland > Midland > 36
John Westbrook 45 (1825) Millwright born NY
Elizabeth Westbrook 34 (1836) born New Brunswick
Mahala Westbrook 13 (1857) born Canada
Malvina Westbrook 11 (1859) born Canada
Lewis Westbrook 9 (1861) born Canada
I found the marriage records for the 2 girls
Marriage Date: 01 Jun 1881
Place: Pine River, Gratiot, Michigan
Bride - Malvina A. Westbrook, 21 years, b. 1860 in Canada
Groom - John J. Buchanan, 34 years, b. 1847 in New York
Their daughter was Bertha Buchanan who married Henry Ewald.
Marriage Date: 08 Dec 1877
Place: St Louis, Gratiot, Michigan
Bride - Mahala Westbrook, 20 years, b. 1857 in Canada
Groom - Arthur Stewart, 30 years, b. 1847
I did not find any marriage record for Lewis Westbrook
I can not find John and Elizabeth Westbrook in any other records.
I would love to have more information about this family.