Puzzle - Decker roots

 NO CHANGE FROM 1Q ??

 Decker, John Christian    a.1812 Ger - 1853 NY         

    ______, Margaretha        a.1814 Ger - 1893 NY        maiden name Meyer or Baker? 

          Henry                            1843 NY - 1911 NY        never married

          George Wilhelm           1848 NY - 1896 NY        children John & Edna?

          John                              1850 NY - 1930 NY        my great-grandfather 

Little is known of John Christian Decker, who died young and thus only appears in 1850 census, occupation grocer, from Germany.  Since he doesn't appear in 1840 census, and his 1st child was born in NY in 1843, it appears that he immigrated sometime in-between, marrying either before or after immigrating.

His wife Margaretha / Mena appears also in 1870 and 1880 census, widowed, living with sons. Unclear where from in Germany: Bavaria listed on 1870 census, Hanover listed on 1880 census. Maiden name blank on her death certificate; listed on sons' death certificates as Meyer, Baker, blank.

Records not found:

   1855 NY census - Decker, Margaretha and sons Henry, George, John

   1860 census - Decker, Margaretha and sons Henry, George, John

   1880 census - Decker, George - perhaps married? perhaps children John & Edna?

Church:

   1843 birth  - Decker, Henry

   1848 birth  - Decker, George Wilhelm

   1850 birth  - Decker, John

   1853 death - Decker, John Christian
   Possible marriage? - Decker, John Christian & Margaretha

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SOURCES

1.   1850 U.S. census, John Decker household

2.   1870 U.S. census, Margaret Decker household

3.   1880 U.S. census, Margaret Decker household 

9.   1893 Death record, Margaret Decker