Here’s my ignorant off the cuff responses to the following:
(1) how are the post-Flood giant bloodlines connected to the antediluvian ones (i.e. through the wives of Noahs sons OR did someone actually survive the Flood OR other?).
QX I do not think/believe any of those running around on the surface interacting with humans survived the flood. IF they did, they must have been in sealed suberranian or subsea havens.
It has been stated that Noah’s purity of DNA was one of the criteria involved in his selection etc.
(2) what if any archaeological evidence exists that can be traced to the post-Flood giant tribes,
There’s LOTS of archeological evidence in California, China, Balkans etc. re giants 15 feet tall etc. You can track down their skeleton pics via dogpile.com.
Search for
GIANTS + SKELETONS + PICS
or some such
(3) what are the written languages of the post Flood giant tribes in the mid-2nd millennium BC (one of the many cuneiform dialects or possibly even hieroglyphics in the case of the Amalekites who lived on the Sinai Peninsula in the time of Moses?).
I don’t have any hint of anything in my noggin in those directions. Sorry.
Considering that caves were common dwellings at that time anyway, one with a very large air pocket (it would need a large supply of oxygen) might have been easily used by some or many enterprising fallen offspring.
As to (2), I should have been clearer. I mean archaeological evidence traceable to those giant tribes in ancient post-Flood Israel.