Have you found the birth/baptismal record of your Paul Schneible yet? Born 22 Dec 1822 in Ottenau, rather than 21 Dec as his tombstone says. Baptized the next day.
Parents Paul Schnaible and Rosina Fritz. Witnesses to the baptism were Benedikt Woelker(?) and Bernard Schnaible. Godfather (presumably, but I can't make out the word) was Joseph Steimer.
Paul's emigration record also gives 22 Dec 1822 as his birth date. Single when he emigrated.
A family tree at Ancestry.com shows Paul and his wives at Rome. Also a Sophia Heitz is shown in that tree. Two Heitz brothers came to Rome from Ottenau 1849-1854. Also Elias Steimer and Julianna Herrmann in 1851.