Cornelius traveled with his wife, Lavina, and two sons. The Van Leuven family lived in Pottawattamie in 1850, according to census records. In 1860, they are located in Utah census records. Cornelius's death date and birth date are confirmed by his obituary.
His mother, Mary Ann Pulver Van Leuven, also traveled to Utah with the 1852 Robert Wimmer Company.