I just re-read your message and noticed that you are looking for a Santiago/James BANEGAS not Ackenback. I guess the first time I just read past the name and assumed you were looking for Ackenbacks.
I've re-checked my file and cannot find any evidence of a Santiago or James Banegas born April 17, 1876 with a sister named Rosa. However, that doesn't mean that he isn't part of the Dona Ana family.
Since I started doing research on the BANEGAS branch of my family I have located many, many descendants. However, there are still descendants that I haven't been able to locate.
If I do locate any info on you Santiago/James BANEGAS, I'll be sure to contact you.