It's great to hear from you.I can help you with the following information.William Griffin and Mary A. Palomore (Palmer) are my gggrandparents.Martha is Martha Caroline Griffin and James J. is James Jourdine Griffin.
Thomas Griffin is William's brother.
Thomas and William did have a sister named Sarah but that is all I can tell you about her.I have found no connection to the McElroys.
I can tell you that William and Thomas' parents were Buckner Griffin and Martha Freeman if this helps you.
Sorry I still haven't found anything on the Palmer/Palomore family.