Notes:

(Research):I've not found when Andrew came ot the U.S. However the following were on the ship Espindola along with the Raferts on 17 Sep 1852 and were also listed as being from Meinsen.

Ostermeyer, Leonore, age 46 (from Meinsen) (so born about 1806)
Ostermeyer, Caroline, age 22 (from Meinsen) (so born about 1830)
Ostermeyer, Engel, age 18 (from Meinsen) (so born about 1834)
Ostermeyer, Johan., age 16 (male from Meinsen) (so born about 1836)
Ostermeyer, W. age 49 (male weaver from Warlem) (so born abot 1803)
Ostermeyer, Wilh. age 28 (from Bergsdorf) (so born about 1824)

On 30 Oct 1851 a Fredrick Ostermeyer, age 24, from Weitersham was aboard the G. F. Patten.

1850 Federal Census: Warren, Marion County, IN
Ostermar, Charles, age 56, Farmer, born Germany
Ostermar, Lony??, age 53, born Germany
Ostermar, Frederick, age 22, born Germany
Ostermar, Anthony, age 16, born Germany
Ostermar, Christina, age 10, born Germany
Ostermar, Henry, age 7, born Indiana

1860: Indianapolis Ward 7
Ostermeyer, Andrew, age 26 in Germany, RR Employee
Ostermeyer, Caroline, age 21 in Germany
Ostermeyer, Andrew, age 2 in IN
Ostermeyer, William, age 9/12 in IN, Census dated Jun 1860 (so prob Sep 1859)

1868 City Directory: Anthony Ostermeyer, laborer, bds 87 E. South.

Andrew-Anthony married Phillipina Wilhelmine Caroline Röver 6 Oct 1856, Indianapolis, Marion County, IN. Phillipina (daughter of Carl Fried. «u»Wilhelm«-u» Röver and Caroline Eleanore Hof) was born 14 Sep 1838, Meinsen, Schaumburg-Lippe; was christened 23 Sep 1838, Evangelical Church, Meinsen, Shaumburg-Lippe; died 1919, Indianapolis, Marion County, IN; was buried , Concordia Lutheran Cemetery, Indianapolis, Marion County, IN. [Group Sheet]