Do you have some approximate dates of birth or states where these Rehfeldts lived? My husband's grandmother was Lydia Rehfeldt and we have some Hermans and Williams in different generations. The states that I know our Rehfeldts lived in are Iowa and Washington. If any of this fits let me know and I can dig out the little bit of info I have been able to come up with. We still have some Rehfeldts in our town that are related, ages 80 and lower.