If you could be a little more specific about what information you are looking for in order to fill in some blanks, I'd be glad to help you. Two daughters of Heinrich and Mina Tjaden Collmann married two sons of my ancestors, Menne and Ida Flohr Warnkes, so I have collected some information about the Collmanns. I also have information about the Tjadens, though they are from different ancestors than my Tjaden line.
Cheers,
Amy Robbins-Tjaden
atjaden@gmail.com