At least five (nominally nine) generations of ancestry for August Sy, who married Auguste Wilhelmine BÃ¶ning 9 May 1875 at Bergholz (near LÃ¶cknitz/Uckermark) are compiled in the book "Sy-Hugenotten: Stammtafeln der Familien Sy aus der Uckermark" by the late Johanna Oqueka and the late Hans Wendt [self-published 1978 but available on LDS Microfilm 1181582, item 2]. Start on page 159 and work backward as directed.
August Sy was born 13 January 1850 at Grimme, son of Laborer Peter Sy and Maria Charlotte Procasse. He died 21 Nov 1932 at Unionville, Michigan. Auguste Wilhelmine BÃ¶ning was born 15 August 1848 at Bergholz/Uckermark, daughter of Christian Friedrich BÃ¶ning and Dorothea Dewitz. She died 9 Sept 1930 at Unionville, Michigan.
Three of their children were born in Bergholz/Uckermark: a son born 28 April 1876 died the same day; son Albert Ferdinand August Sy was born 10 August 1876 but died 13 June 1889 at St Johnsburg/NY; daughter Auguste Louise Sy was born 21 April 1879 (no further information is given).
Emigration must have occurred around 1880-81. Three children seem to have been born in Bergholz/NY: Gustav Ferdinand Sy (born 11 June 1882, married 3 January 1907 at Unionville to Helene Pretzer); Hermann August Sy (born 30 Nov 1885, married to Ida Brecht); Johann Rudolf Albert Sy (born 11 January 1888, died Feb 1981, married 8 January 1914 at Unionville to Katharina Maria Menzel).
An unnamed daughter, born 11 Nov 1889 at St Johnsburg/NY, died the same day. St Johnsburg (originally called Johannisberg, I think in honor of a small settlement just east of LÃ¶cknitz) is a "colony" just east of Bergholz/NY, which is itself a few miles east of Niagara Falls and just north of North Tonawanda.
Relocation to Michigan must have occurred around 1890-92. The eighth and last child Anna Louise Ernstine Sy was born 23 Sept 1893 in Akron Twp, Tuscola Co, Michigan. She married Richard Neubauer (age 26, from Saginaw) 23 March 1913 at Unionville.
The above information came partly from "Sy-Hugenotten," partly from Bergholz/NY and Unionville/MI cemetery and Lutheran church records, partly from the Social Security Death Index (SSDI), and partly from local maps (e.g., Mairs Geographischer Verlag).