Not sure this info is correct.

Question

I have Tilmon as my grandfather's half brother and my father told me stories about him.  Your info suggests he is Thadee's son.  My info is that he is Thadee's grandson.

Answer 1

You could post a message on the profile page for Thaddee Cormier or send the manager of the profile a private message...either way indicating your knowledge and sources.  They would likely wish to collaborate with you to have more accurate information.  You could even join wikitree if you wanted and help manage the information on your relatives and ancestors.  Have a great day!