I realize this is an old message post, hopefully this will get to your e-mail. You are the first person I could find with any connection to the Brenneck family.
I have also been researching William J. Brenneck b. 1865 d. 1908. He was my husband's great grandfather on his mother's side. I just received his death cert. today and now I have his parent's names. His father John being born in Massachusets was definitely odd. I don't have a town in New Foundland where they came from I was hoping that you did.
Well I hope you received this. I would truly appreciate it if you would contact me Thanks so much.