Hello Dale,I started looking up my family tree over 15 year ago, got stuck and left it alone.Just now getting back into it and I happened to find this post with a Google search on Aldemar Charpentier.
Based on your post, I believe your father Aldemar is brother of my grandfather Joseph and son to Joseph, b.1865 and Amanda Dupuis, b. 1866. From stuff that my dad left me I have found that Aldemar had 6 siblings.They were Joseph (my grandfather - the one with the lumber business), Blanche, Fleur (Florence?), Paul, Isabella and Ovilla.
If Fleur is Florence, she was married to Lorenzo LaLiberte.
I do have some more info on the Rhode Island Charpentiers if you are still looking for it. Let me know.