Hello, I have alittle information here that might help you as well as the others that posted a reply to your message.
I have been working on the Beilke family history for almost 11 years and have gathered a lot of information so I would be happy to help you if I can.
I have found your Wilhelmina with both spellings. BUTT and BUTTKE. How ever I guess since as of this point I have just been gathering all the information on every Beilke I find in the courthouse I haven't really paid much attention to how all of them fit together yet due to the large number of people. My plan was to gather first and piece later. IF you would like I can see what I have exactly on your two people.
There are two other BUTTKE's listed as being married to two other BEILKE's. Their names were August Edward Beilke and Adeline Mathilda BUTTKE As well as Carl Beilke and Caroline BUTTKE.
If I can be of any help please feel free to contact me. NicoleLoomis75@msn.com