Johann Adam Seib was born in 1717 in Nierstein, a town located 29 kilometers north of Worms in the modern German State of Rhineland-Palatinate. He married on 14 April 1744 to Maria Elisabetha Vooss, the daughter of Johann Valentin & Agness Maria Vooss, in the Catholic Church in Guntersblum, 10 kilometers south of Nierstein. Maria Elisabetha had been baptized in this church on 13 January 1726. They had three known children, each baptized in Guntersblum: (1) Maria Sybilla, baptized on 26 February 1745; (2) Franz Carl, born on 24 February 1748 and baptized on 25 February 1748; and (3) Johannes, born and baptized on 4 January 1751. Johann Adam's wife died, and he remarried to Barbara (surname unknown). They had a girl named Anna Katharina, baptized on 18 Dec 1763 in the Catholic Church in Alsheim, 4 kilometers south of Guntersblum. Johann Adam Seib and his family immigrated to Russia as colonists of the recruiters De Beuve and Precourt, departing from the port of Lübeck by a Russian vessel under the command of the Lieutenant Korsakov, and arriving in Oranienbaum, Russia, on 31 July 1766. On 20 August 1767, the Seib family arrived in the Volga colony of Sewald. They are recorded there on the 1767 Census in Household No. 18 with son Franz Carl registered in Household No. 19. Their descendants are recorded still living in Sewald on the 1798 Census in Households No. Sd12 & Sd27.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga: Economy, Population, and Agriculture (Lincoln, NE: American Historical Society of Germans from Russia, 1999).
- Parish records of Guntersblum (LDS Film No. 949084).
- Parish records of Alsheim (LDS Film No. 949094).
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Nordost-Institut, 2008): 171.
- Pleve, Igor. List of Colonists to Russia in 1766 "Reports by Ivan Kulberg" (Saratov: Saratov State Technical University, 2010): 189.