Jaha is a name known to be Nipmuck Indian. Check this link on the Earle Report, which was a sort of Indian Census done in MA in 1859:

http://freepages.history.rootsweb.ancestry.com/~history/graf...

I will look throught the records that I have to see if I can find additional info on the Jaha family. Send me an email at watchcrow@aol.com with your email address and any info on the Jahas that you currently have to be sure that I don't redo what you've already done.

Best,
Cheryl