Iowa 1850 Census of Union Township, Appanoose Co. Ser # 2623 pt 1 pg 47 says that living with Philip Smith and wife Sarah was John Smith age 75 born in Virginia.
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AF [?Ancestral File?} also lists as Johan Christian Schmidt, born 1763 in Va. Died 1824 in Ia (Iowa?) married abt. 1809. Lists 1 son: John Smith b. 1803 in Isernhagen, Lippe, Germany, Died: 31 Aug 1873 in Ireland.