My GGG-Grandfather Peter Gerst and four of his siblings, Franziska(Braun), Catherine, Wendelin, and Jakob emigrated to Mo. in 1849 as best as I can pinpoint it from the Bavaria region- Peter to SE Mo. and his siblings to St. Louis. Only Jacob is unaccounted for. There is a record of a Jacob Gerst- age 30- taking a citizenship oath in St. Louis in 1849. In the Earl Fischer Database, there is a record of a Jacob Gerst dying in 1855.It is a possibility. Also, there is a marriage record of a Elisabeth Gerst m. Joseph Gigleux on 22Apr1867 in St. Clair Co.,Ill (her daughter). Would the father's name be mentioned on this marriage info?