Family #71 in the 1834 Grimm census.
Family #75 in the 1857 Grimm census.
According to the 1857 census, he and his family moved to Rosenberg in 1852.
Because of the 14-year gap between the birth of his third and fourth child, it seems likely that he and his wife had some daughters born between 1835 and 1842. These women were probably old enough to be married and living with other families in 1857. They may have remained in Grimm or they may have moved to Rosenberg with the rest of their family members. It's possible the 1857 Rosenberg census might reveal some of these marriages if these daughters and their husbands still lived with the Wittmann family.
Child #1 Christian Jakob Wittmann, age 24 years 6 months
Child #2 Katharina Elisabeth Wittmann, age 18
Child #3 Elisabeth Wittmann, age 16
Brother #1 Konrad Wittmann, age 42 in 1850, to Rosenberg in 1852
Child #4 Valentin Wittmann, age 21 in 1850, to Rosenberg in 1852
Child #5 Michael Wittmann, age 19 in 1850, to Rosenberg in 1852
Child #6 Johann Georg Wittmann, age 17 in 1850, to Rosenberg in 1852
Child #7 Johann Friedrich Wittmann, age 3 in 1850, to Rosenberg in 1852
Brother #2 Unnamed Wittmann, probably Johann Michael Wittmann, probably deceased before 1850 and his death noted in that male-only census
Child #8 Georg Heinrich Wittmann, age 18, nephew by unnamed brother
Child #9 Johannes Wittmann, age 16, nephew by unnamed brother
Child #10 Heinrich Wittmann, age 14, nephew by unnamed brother
Child #11 Konrad Wittmann, age 12, nephew by unnamed brother
↑1834 Census of Grimm in the District of Saratov, Russia, dated 2 February 1835; Translated by Brent Mai, Concordia University, Portland, Oregon; Published by Dynasty Publishing, Beaverton, OR, USA; Published 2011; page 22-23, family #71, Martin Wittmann family.
↑1857 Census of Grimm in the District of Saratov, Russia, dated 5 November 1857; Translated by Brent Mai, Concordia University, Portland, Oregon; Published by Dynasty Publishing, Beaverton, OR, USA; Published 2005; page 30, family #75, Johann Wittmann family.