Debra - I don't know how much researching you've done already, but one source you might try is the Minnesota Historical Society web site http://MNHS.ORG
On the web site they have an online index of death and birth certificates. I looked up your two surnames Lehmbecker/Lembecker and found many of the names you indicated in your original message. Almost all of them reflect Hennepin County and not Ramsey County which is the board where you posted your note to. You also can order death/birth certificates for a small fee from the web site as well.
Let me know if I can be of any other help.