Yes, there was many Somppi-families in Ylistaro, for example; Johan Somppi and Maria Michelsdotter(25yrs). Their son Hedvig was born 3.5.1846. I found one Isak Somppi from Ylistaro(born 1879), who migrated to America and Sanna Jemina Somppi(b.1883) who also moved to America.
Actually, if you don´t know this already, here´s a good site to look for ancestors(or atleast I found it useful to locate my relatives):www.migrationinstitute.fi/migration
-I think there should be some good links!