Have done quite a bit of research in Madison co IN on the Huntzingers as my husband's gggrandfather was Daniel Huntzinger who I.believe was Sebastains step-father. I believe Susanna was probably Gabriel Huntzinger's daughter as on the 1850 census of Hamilton Co In in Wayne Twp. Gabriel had a daughter Susanna 16 years of age. There is a book in the Salt lake City Library that has some of the marriages from 1853 to 1858 in Madison Co. In.I will be going in 3 weeks and will try to look for their marriage. Also they might have married in Hamilton Co which has marriage records for that time period. Will let you know if I find anything.